Photo - Christina Bickelmann 2004

400 W. Congress, Suite 518
Tucson, AZ 85701

(520) 770-3800
www.azwater.gov

Regulatory List
List for
for the
the Arizona
Arizona Department
Department
Official Regulatory
Official
of Water
Water Resources,
Resources, Tucson
Tucson Active
Active Management
Management Area
Area
of

Low Water Use
Drought Tolerant Plant List

!

ROP YOUR WATER USE

Anyone interested in more information or Tucson nurseries that would like to sign up for the
program should contact Christina Bickelmann, Water Conservation Specialist for the Tucson
ADWR office @ (520) 770-3816 or email: clbickelmann@azwater.gov

Retail nurseries that participate receive free posters, water drop stickers for their signage and
handouts for their customers explaining the program and watering guidelines. In addition all
participating nurseries will be listed on the ADWR website and will be promoted in press releases
and at community events.

To date, fourteen Tucson retail nurseries and all six Tucson area Home Depot’s have signed up for
the program. ADWR is working with other nurseries to encourage them to participate. Wholesale
nurseries in Phoenix and Tucson are also participating in the program by adding water drop
symbols to the labels on plants to be sold in Tucson.

Although the plants are all low-water-using, the frequency that they need to be irrigated varies
from approximately once a week to once a month after the plants are established (in about 2-3
years). ADWR hopes that consumers will use separate valves on their irrigation system to water
each zone and irrigate trees separately, enabling them to manage their irrigation water use more
efficiently.

By choosing plants with the same number a gardener can more successfully group plants by
water needs.

Three is moderate water use.

Two is low water use,

A “number one” indicates very low water use
mostly native Sonoran and Chihuahuan desert plants,

All of the labeled plants are Xeriscape plants currently on the Tucson AMA -Low Water Use/
Drought Tolerant plant list. The one through three numbering system correlates with the plant list.

The program is a voluntary collaboration between ADWR and local nurseries that uses a simple
water drop system to identify plants with similar water requirements. Plants are labeled one
through three, distinguished with corresponding water drops and numbers.

The Tucson office of the Arizona Department of Water Resources (ADWR) has developed a new
pilot program, Drop Your Water Use, to educate retail nursery customers on how to plan and
maintain a healthy and water efficient landscape.

Tucson is Educating Consumers to Drop their Water Use . . .

D

Updated March 2007

An advisory committee of local plant experts reviews all applications for modification and
submits recommendations to the AMA Director for final consideration.

Applications for additions, deletions or exceptions to this list may be submitted to the
Department of Water Resources, Tucson Active Management Area Office for consideration.
Phone: (520) 770-3800. The list and application forms may be downloaded from the ADWR
website at www.azwater.gov/TAMA.

The plants on this list can be grown in the Tucson area with very low to moderate supplemental
irrigation once they are established. Supplemental irrigation should be of sufficient quantity to
saturate the plant’s root zone. All plants listed can grow with less water than traditional high
water-use landscape plants and do not require more than the ADWR regulations for low wateruse plants in the Tucson AMA, a maximum of 18 inches of supplemental irrigation on an
annual basis, not including rainfall. In addition to water requirements, other suitability factors
(e.g. highly invasive, cold hardiness, etc.) may be considered to determine acceptability of
individual plants for addition to the list.

This list can also be used as a resource for residents and businesses that are interested in
conserving water. The list provides a wide array of plants to accomplish a variety of low wateruse landscape designs.

This official regulatory list was developed to guide the regulated community in choosing low
water-use and drought tolerant plants for landscaping. Landscaping planted after January 1,
1987 within publicly owned rights-of-way and irrigated with groundwater may be planted only
with plants listed on the ADWR Low Water Use/ Drought Tolerant Plant List for the Tucson
AMA. The director may waive this requirement under special circumstances. This requirement
does not apply to any portion of a residential lot that extends into a publicly owned right-of-way.
Many local jurisdictions have adopted this list for regulatory purposes; contact your local
jurisdiction for their landscape requirements.

Arizona Department of Water Resources - Tucson Active Management Area
Pima County, City of Tucson, Town of Oro Valley, Town of Marana

OFFICIAL REGULATORY LIST FOR:

LOW WATER USE/DROUGHT TOLERANT PLANT LIST

Irrigation: most plants require regular irrigation during the first 2- 3 year establishment period

Average annual rainfall for Tucson is 11-12"; in low rainfall years the plants on the list may need additional irrigation
to maintain good appearance and plant health.

S
Sc
T
V
P

shrub
succulent
tree
vine
perennial

(sh) semi-hardy - some dieback in a hard frost (mid 20’s F)
(t) tender - severely damaged or killed in a hard
frost; when temperatures drop to 32º F or below

Cold Hardiness: if plants do not suffer any
damage at 20º F or below they are considered
cold hardy and do not have a code in the column

H: Mature plant height measured in feet
W: Mature canopy size measured in feet

Flower Color:
Includes annotations for fall color, berries

Toxic: may be harmful if eaten. Call Arizona Poison Control Center at 626-6016
Invasive (INV): may spread and intrude into natural areas
Spreads in Cultivated Areas (SCA): may spread by seed or sucker in urban or cultivated areas, and in
disturbed soils

Special Considerations:

Note: Chihuahuan and Sonoran Desert Regions annotated by Matt Johnson, Native Plant Society.

Native Plants are listed under Origin using the following symbols:
CD
Chihuahuan Desert- includes north central and NW Mexico, SW Texas, southern New Mexico and
extreme SE Arizona
SD
Sonoran Desert – includes arid and semi-arid areas of NW Mexico, SE California and most of
Arizona south of the Mogollon Rim

Allergenicity of the plants was classified with the help and advice of Michael J. Schumacher, M.D., Professor,
Dept. of Pediatrics and Head, Allergy-Immunology Section, Univ. of Arizona Health Sciences Center and Mark R.
Sneller, Ph.D., Office of Pollen and Mold Control, Pima County Health Dept.

Note: the timing of the freeze, duration of the freeze, the temperatures the next day and the second night
temperatures will affect how severely damaged the plant will be.

Allergenicity (AL):
a strongly allergenic
b moderately allergenic
c weakly allergenic

Plant Type (PT):
A accent plant
C cactus
Gc groundcover
Gr ornamental grass
An annual

Growing Season (GS):
Wi winter – apply water September through March; less frequently in off season
Su summer – apply water March through September; less frequently in off season

*

Water use (WU)
1 – Very low, irrigate every 3-4 weeks during the growing season after establishment
2 – Low, irrigate every 2-3 weeks during the growing season after establishment
3 – Moderate, irrigate weekly during the growing season after establishment

Key to symbols:

Low Water Use Drought Tolerant Plant List - Tucson Active Management Area
WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

2

Abutilon palmeri

Indian Mallow

Apricot

Summer

S

3

4

Su

2

Acacia aneura

Mulga

Yellow

Spring

T

18

18

Su

2

Acacia angustissima

White Ball Acacia

White

Late Spring to Late
Summer

S

5

5

3

Acacia berlandieri

Guajillo

White

Summer

T,S

15

1

Acacia constricta

Whitethorn, Mescat Acacia

Yellow

Spring to Summer

T,S

1

Acacia crasspedocarpa

Waxleaf Acacia

Yellow

Spring to Summer

2

Acacia cultriformis

Knife-Leaf Acacia

Yellow

3

Acacia farnesiana (smalli)

Southwestern Sweet Acacia

1

Acacia greggii

2

AL

INV

SCA HARDY

ORIGIN

sh

SD

c

sh

Austr.

Su

c

sh

SD

15

Su

c

20

20

Su

c

T,S

15

15

Su

c

Spring

T,S

15

15

Su

c

Yellow

Spring

T,S

25

25

Su

c

Yes

Yes

SD,CD

Catclaw Acacia

Creamy Yellow

Spring to Summer

T,S

15

20

Su

c

Yes

Yes

SD,CD

Acacia notabilis

Notable Acacia

Yellow

Late Spring

S

8

15

Su

c

Austr.

2

Acacia redolens

Prostrate Acacia

Yellow

Spring

S,Gc

5

12

Su

c

Austr.

2

Acacia rigidula

Black Brush Acacia

Yellow

Spring

T,S

15

9

Su

c

CD

2

Acacia salicina

Willow Acacia

Creamy White

Spring

T

40

30

Su

c

sh

Austr.

2

Acacia saligna

Weeping Wattle

Orange-Yellow

Early Spring

T

25

20

Su

c

sh

Austr.

Tuesday, March 27, 2007

CD
Yes

Yes

SD,CD
Austr.
sh

Austr.

Page 1 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

3

Acacia schaffneri

Twisted Acacia

Yellow

Spring

T

20

25

Su

c

CD

2

Acacia stenophylla

Pencilleaf Acacia

Creamy White

Early Spring

T

30

20

Su

c

Austr.

2

Acacia willardiana

Palo Blanco

Pale Yellow

Spring

T

20

10

Su

c

3

Achnatherum hymenoides
(Oryzopsis hymenoides)

Indian Ricegrass

Green

Spring

Gr

2

2

Su

a

1

Agave americana & varieties

Century Plant

Yellow

Once (Summer)

A,Sc

7

8

Su

2

Agave angustifolia v. marginata

Narrow leaf Agave

Greenish-Yellow

Once (Summer to
Fall)

A,Sc

3

4

Su

t

Mex.

2

Agave bovicornuta

Cow's Horn Agave

Yellow

Once (Spring to
Summer)

A,Sc

3

4

Su

sh

Mex.

2

Agave bracteosa

Spider Agave

White, orange

Once (Summer)

A,Sc

2

2

Su

2

Agave celsii

Greenish with
purple/red tinge

Once

A,Sc

2

2

Su

2

Agave chrysantha

Golden Flower Agave

Yellow

Once (Summer)

A,Sc

3

4

Su

2

Agave colorata

Mescal Ceniza, Blue
Century Plant

Yellow

Once (Spring to
early Summer)

A,Sc

3

3

Su

2

Agave desmettiana & varieties

Smooth Agave

Pale Yellow

Once (Spring)

A,Sc

3

6

Su

2

Agave fillifera

Agave

Green then reddish

Once (Summer)

A,Sc

2

3

Su

2

Agave geminiflora-solitary

Twin-flowered Agave

Yellow tinged with
red

Once (Fall to Winter)

A,Sc

3

3

Su

2

Agave havardiana

Havard Agave

Greenish Yellow

Once (Spring)

A,Sc

3

4

Su

Tuesday, March 27, 2007

sh

SD
SD,CD
CD

E. Mex.
sh

AZ
SD

t

Mex.
CD

sh

Mex.
CD

Page 2 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Agave lophantha (univittata)

Holly Agave; Center Stripe
Agave

Greenish Yellow

Once

A,Sc

3

6

Su

2

Agave macroacantha

Black Spine Agave

Green

Once

A,Sc

2

2

Su

2

Agave montana

Mountain Agave

Green, Creamy
White

Once

A,Sc

4

6

Su

2

Agave multifilifera

Chahuiqui

Light Green with
Pink Margins

Once

A,Sc

3

5

Su

2

Agave murpheyi

Murphy Agave

Pale Green

A,Sc

3

3

Su

SD

2

Agave ocahui

Ocahui Agave

Yellow

Once (Fall)
produces bulbils on
flower stalk
Once (Spring to
Summer)

A,Sc

3

3

Su

SD

2

Agave ovatifolia

Whales Tongue Agave

Pale Green

Once

A,Sc

3

3

Su

2

Agave palmeri

Palmer Agave

Pale Green

A,Sc

4

4

Su

SD

2

Agave parrasana

Parras Agave

Yellow

Once (Summer)
produces bulbils on
flower stalk
Once

A,Sc

2

2

Su

Mex.

2

Agave parryi & varieties

Agave

Yellow

Once (Summer)

A, Sc

2

2

Su

2

Agave parryi var. huachucensis

Huachuca Agave

Pink buds opening
to Yellow

Once (Late Spring to
early Summer)

A,Sc

2

3

Su

2

Agave parviflora

Small Flowered Agave

Pale Yellow

Once (Summer)

A,Sc

.5

.7

Su

SD

2

Agave pelona

Mescal Pelon

Red

Once (Spring)

A, Sc

2

2.5

Wi

SD

2

Agave potatorum

Butterfly Agave

Pale Green

Once

A,Sc

1

2

Su

t

Oaxaca Mex.

2

Agave salmiana ssp. Ferox

Pulque Agave, Salm's Agave

Yellow above
Green below

Once

A,Sc

4

6

Su

sh

Central Mex.

Tuesday, March 27, 2007

CD
sh

Mex.
Mex.

sh

sh

Yes

CD

Mex.

Yes

CD

Yes

SD

Page 3 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Agave scabra

Rough-leaved Agave

Yellow

Once (Late Spring to
Fall)

A,Sc

4

4

Su

CD

2

Agave schidigera

Agave

Dark Purple

Once (Fall to Spring)

A,Sc

2

3

Su

Durango
Mex.

2

Agave shawii

Yellow

Once (Spring)

A,Sc

3

5

Su

2

Agave striata

Yellow, sometimes
Red- Purple

Once (Summer)

A,Sc

3

3

Su

Mojave D

2

Agave utahensis

Yellow

Once

A,Sc

1

2

Su

Mojave D

2

Agave victoriae-reginae &
varieties

Queen Victoria Agave

Reddish Purple

Once (Summer)

A,Sc

1

2

Su

Mex.

2

Agave vilmoriniana

Octopus Agave

Yellow

A,Sc

4

6

Su

2

Agave weberi

Weber Agave

Yellow

Once (Spring)
produces bulbils on
flower stalk

A,Sc

4

6

Su

1

Aloe barbadensis

Aloe Vera, Medicinal Aloe

Yellow, Orange,
Red

Late Winter to
Summer

Sc

2

2

Wi

sh

Africa

2

Aloe ferox

Cape Aloe

Orange Red

Late Winter early
Spring

Sc

15

3

Su

sh

Africa

1

Aloe saponaria

Tiger Aloe, Mediterranean
Aloe

Yellow, Orange,
Red

Winter to Spring

Sc

1

1

Wi

sh

Africa

2

Aloe variegata

Partridge Breast Aloe

Dark Pink to Red

Winter to Spring

Sc

1

1.5

Su

2

Aloe x 'Blue Elf'

Orange-Red

Winter to Spring

A,Sc

2

1

Wi

2

Aloysia gratissimma

Fragrant Bush, Bee Bush

White

Spring

S

6

8

Su

2

Aloysia wrightii

Wright's Bee Bush

White

Spring to Fall

S

4

4

Su

Tuesday, March 27, 2007

Needle-leaf Agave, Espidine

Once

sh

sh

Baja Cal.
Mex.

SD
Mex.

Africa
sh
Yes

Yes

garden
variety
SD,CD
SD,CD

Page 4 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

1

Ambrosia deltoidea (Franseria)

Triangle-leaf Bursage

inconspicuous

Mid-Winter to midSpring

S

2

2

Wi

a

SD

1

Ambrosia dumosa (Franseria)

White Bursage

inconspicuous

Mid-Winter to midSpring

S

2

2

Wi

a

SD

3

Amsonia grandiflora

Large-flowered Blue Star

White tinged with
Lavender

Spring to early
Summer

S,P

3

3

Su

SD

2

Anisacanthus quadrifidus &
varieties

Flame Anisacanthus

Orange, Red

Summer to Fall

S

5

5

Su

CD

2

Anisacanthus thurberi

Desert Honeysuckle

Orange

Spring to Fall

S

6

4

Su

SD

2

Antigonon leptopus

Queen's Wreath

Pink, White, Red

Summer and Fall

V

20

20

Su

2

Aristida purpurea

Purple Three-awn

Green, Green to
Blue foliage

Spring to early Fall

Gr

2

1

Su

2

Artemisia ludoviciana

Prairie Sagebrush,
Wormwood

inconspicuous

July-Oct

S,Gc

1

3

Su

3

Asclepias linaria

Pine Leaf Milkweed

White

Spring to Fall

S

3

3

Su

Yes

1

Asclepias subulata

Desert Milkweed

Pale Yellow, White

Late-Spring to Fall

P

3

3

Su

Yes

1

Aster bigelovii

Purple Aster

Blue

Late-Summer to
early Fall

An

1-3

.5

1

Aster tanacetifolius

Purple Aster

Purple

Summer to Fall

An

1.5

1

Atriplex canescens

Four-Wing Saltbush

inconspicuous

Spring to Fall

S

2

Atriplex lentiformis

Quail Bush

Greenish

Late Winter to Spring

2

Atriplex lentiformis breweri

Brewer Saltbush

Light Yellow

Summer

Tuesday, March 27, 2007

t
Yes

Yes

SD
SD,CD

a

SD
SD,CD
sh

SD

Su

t

SD

.5

Su

t

SD,CD

4

8

Su

a

SD,CD

S

10

15

Su

a

SD

S

10

10

Su

a

SD

Page 5 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

1

Atriplex nummularia

Old Man Saltbush

inconspicuous

S

9

15

Su

a

Austr.

1

Atriplex polycarpa

Desert Saltbush

inconspicuous

S

3

6

Su

a

SD

2

Atriplex semibaccata

Australian Saltbush

inconspicuous

S

1

6

Su

a

Austr.

2

Baccharis hybrid 'Starn'

Thompson Broom

inconspicuous Tan

Gc

4

5

Su

c

garden
cultivar

2

Baccharis sarothroides and
hybrids (male varieties only)

Desert Broom

Cream, White

Fall

S

9

9

Su

a

SD

1

Bahia absinthifolia

Desert Daisy

Yellow

Spring to Fall

P

1

.5

Wi

1

Baileya multiradiata

Desert Marigold

Yellow

Spring through Fall

P

1

1

Wi

3

Bauhinia lunaroides

Pink or White Orchid Tree

Pink, White

Spring to early
Summer

S

12

10

Su

2

Bebbia juncea

Sweet Bush, Chuuckwalla's
Delight

Yellow

Spring to Fall

S,P

4

4

Su

3

Berberis harrisoniana

Barberry

Yellow

Late-Winter to earlySpring

S

3

3

Su

SD

2

Berberis trifoliata

Algerita

Yellow

Spring

S

8

8

Su

SD

3

Berlandiera lyrata

Chocolate Flower

Yellow with
Maroon center

Spring to Fall

P

2

2

Su

2

Bothriochloa barbinodis

Cane Beardgrass, Cane
Bluestem

Green

Late-Spring to earlyFall

Gr

3

3

Su

2

Bougainvillea spp.

Bougainvillea

Purple, Red,
Orange, Pink

Late Spring to Fall

S,V

20

20

Su

2

Bouteloua spp.

Grama Grass

varies by species
Green, Pink,
Orange, Purple

Summer to Fall

Gr

.5 -3

1

Su

Tuesday, March 27, 2007

April through
September

SD
Yes

SD,CD
CD
Yes

SD,CD

Yes

SE. AZ

c

SD,CD
t

a

Brazil
SD,CD

Page 6 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Brachychiton populneus

Bottle Tree

Pink

Late Spring

T

45

30

Su

3

Brahea (Erythea) armata

Mexican Blue Palm

White

Spring

T

30

10

Su

c

SD

3

Buchloe dactyloides

Buffalo Grass

Tan

Summer to Fall

Gr

.5

.5

Su

a

CD

1

Buddleia marrubifolia

Wooly Butterfly Bush

Orange

Spring and Summer

S

5

5

Su

3

Bulbine frutescens and cultivars

Shrubby Bulbine

Yellow to Orange

Fall to Spring

Sc

2

2

Wi

2

Caesalpinia (Poinciana) gilliesii

Yellow Bird of Paradise

Yellow with Red
stamens

Late Spring to Fall

S

10

6

Su

Yes

Yes

Yes

S. Amer.

2

Caesalpinia (Poinciana)
mexicana

Mexican Bird of Paradise
(yellow)

Yellow

Spring to Summer

S

15

10

Su

Yes

Yes

Yes

CD

3

Caesalpinia cacalaco

Cascalote

Yellow

Winter

S

15

18

Su

Yes

t

3

Caesalpinia pulcherrima

Red Bird of Paradise

Red, Orange

Summer

S

6-8

6

Su

Yes

sh

2

Callaeum lilacina (Mascagnia)

Purple Orchid Vine

Purple

Spring and Summer

V

15

10

Su

2

Callaeum macropterum
(Mascagnia macroptera)

Yellow Orchid Vine

Yellow

Spring and Summer

V

25

25

Su

2

Calliandra californica

Baja Fairy Duster

Red

Spring through Fall

S

6

6

Su

1

Calliandra eriophylla

Fairy Duster, False Mesquite

Pink

Spring

S

3

4

Su

2

Calliandra peninsularis

Red Calliandra, Baja Fairy
Duster

Red

Winter to Spring

S

6

6

Su

3

Callistemon citrinus

Lemon Bottlebrush

Red

Off and on all year

T,S

15

10

Su

Tuesday, March 27, 2007

Austr.

CD
sh

S. Africa

Mex.
Caribb.
CD

Yes

sh

SD,CD

sh

SD
SD

c

sh

SD

sh

Austr.

Page 7 of 30

WU

BOTANICAL NAME

COMMON NAME

PT

H

W

3

Calylophus hartwegii & varieties

Calylophus, Yellow Evening
Primrose

Yellow

Spring to Summer

Gc

1.5

3

Su,
Wi

3

Campsis radicans

Common Trumpet Creeper

Orange, Red

Summer to Fall

V

20

20

Su

1

Carnegiea gigantea

Saguaro

White

Early Summer

C

50

25

Su

3

Carpobrotus edulis
(Mesembryanthemum edulis)

Ice Plant

Pale Yellow to
Pinkish Purple

Summer

Gc,Sc

1

6

Wi

t

Africa

2

Cassia artemisioides (Senna)

Wormwood Senna,
Feathery Cassia

Yellow

Late Winter to Spring

S

5

5

Wi

sh

Austr.

2

Cassia nemophila
(C.eremophila)

Green Cassia

Yellow

Winter to Spring

S

9

6

Wi

2

Cassia phyllodinea

Silvery Cassia

Yellow

Winter to Spring

S

6

6

Wi

2

Casuarina cunninghamiana

Australian Pine

T

70

35

Su

b

Austr.

2

Casuarina stricta

Coast Beefwood

T

35

25

Su

b

Austr.

2

Cathestecum erectum

False Grama

Green

Summer

Gr

.5

1

Su

c

SD

1

Celtis pallida

Spiny or Desert Hackberry

Greenish-yellow

Spring

S

16

10

Su

a

SD,CD

3

Celtis reticulata

Netleaf or Western
Hackberry

Greenish

March through
Summer

T

30

30

Su

a

SD,CD

3

Centaurea cineraria

Dusty Miller

Purple, Yellow

Summer

P

3

3

Wi

Medit.

2

Cephalophyllum aestonii `Red
Spike'

Red Spike Ice Plant

Reddish-purple

Winter to Spring

Gc,Sc

0.5

1.5

Wi

S. Africa

3

Ceratonia siliqua

Carob, St. John's Bread Tree

Pink

Spring

T

40

40

Su

Tuesday, March 27, 2007

FLOWER COLOR

BLOOM SEASON

GS TOXIC

AL

INV

SCA HARDY

Yes

Yes

ORIGIN
CD, SD

sh

SE U.S.
SD

Yes

Yes

Austr.
Austr.

sh

Medit.

Page 8 of 30

WU

BOTANICAL NAME

PT

H

W

GS TOXIC

3

Cercis canadensis v. mexicana

Mexican Redbud

Magenta

Early Spring

T,S

15

15

Su

1

Cereus hildmannianus
(C.peruvianus)

Peruvian Cereus, Hedge
Cactus

White

Night blooming in
Summer

C

20

10

Su

3

Chamaerops humilis

Mediterranean Fan Palm

insignificant

n/a

T

15

10

Su

3

Chilopsis linearis and cultivars

Desert Willow

White, Lavender,
Pink, Purple

Late-Spring to Fall

T,S

30

30

Su

2

Chrysactinia mexicana

Damianita Daisy

Yellow-Gold

Spring and Fall

S

2

2

Su

2

Cissus trifoliata v. incisa

Desert Grape Ivy

inconspicuous

Summer

V

20

20

Su

2

Condalia globosa

Bitter Condalia

Early Spring

T,S

15

20

Su

SD

1

Condalia warnockii v.
kearneyana

Condalia, Mexican
Pincushion

White
inconspicuous,
fragrant
White

Early Spring

S

6

5

Su

SD,CD

2

Convolvulus cneorum

Bush Morning Glory

White

Late Spring to Fall

S,Gc

2

3

Wi

3

Convolvulus mauritanicus

Ground Morning Glory

Sky Blue

Spring and Summer

Gc

.5

2

Wi

sh

Africa

2

Cordia boissieri

Anacahuita, Texas Olive

White

Spring to Fall

T,S

15

15

Su

sh

CD

2

Cordia parvifolia

Littleleaf Cordia

White

Spring to Fall

S

8

10

Su

3

Cupressus arizonica & varieties

Rough-barked Arizona
Cypress

inconspicuous

n/a

T

50

20

Su

a

SD,CD

3

Cupressus glabra

Smooth Bark Cypress

n/a

n/a

T

40

20

Su

a

SD

3

Dalbergia sissoo

Rosewood

inconspicuous
green-yellow

T

50

30

Su

Tuesday, March 27, 2007

COMMON NAME

FLOWER COLOR

BLOOM SEASON

AL

INV

SCA HARDY

ORIGIN
CD

sh
c

S. Amer.
Spain

Yes

Yes

SD,CD
SW U.S.

Yes

Yes

SD,CD

Yes

S. Eur.

SD,CD

sh

India

Page 9 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Dalea bicolor & varieties

Dalea Bicolor

Blue

Fall

S

6-8

5-6

Su

CD

3

Dalea capitata

Yellow Dalea

Yellow

Spring and Fall

Gc

1

3

Su

Mex.

3

Dalea frutescens

Black Dalea

Pink, Rose to
Purple

Late Fall

S

4

5

Su

CD

2

Dalea greggii

Trailing Indigo Bush

Pink, Purple

Spring to Summer

Gc

2

9

Su

CD

2

Dalea pulchra

Indigo Bush

Pink, Purple

Winter, early Spring

S

6

5

Su

SD

3

Dalea versicolor v. sessilis

Indigo Bush, Dalea

Purple

Fall to early Spring

S

4

5

Su

SD

2

Dasylirion acrotriche

Green Desert Spoon

Cream on single
erect flower stalk

Summer to Fall

A

4

5

Su

CD

2

Dasylirion leiophyllum

Green Desert Spoon

Spring

A

4

6

Su

CD

2

Dasylirion quadrangulatum
(D.longissimum)

Toothless Desert Spoon

Greenish-yellowon
single erect flower
stalk

Greenish and
White

Late Spring

A

4

5

Su

CD

2

Dasylirion texanum

Green Desert Spoon

Late Spring to early
Fall

A

5

5

Su

CD

2

Dasylirion wheeleri

Sotol, Desert Spoon

Creamy White on
single erect flower
stalk

Tan on erect stems

Mid to late Summer

A

4

5

Su

SD,CD

2

Datura wrightii

Sacred Datura, Jimson
Weed, Thorn Apple

White

Late- Spring to early
Fall

Gc

3

6

Su

2

Dicliptera resupinata

Native Dicliptera

Purple

Spring to Fall

P

2

3

Su

2

Digitaria californica

Arizona Cottontop

White

Summer to early Fall

Gr

3

1.5

Su

3

Dimorphotheca sinuata

African Daisy, Cape Marigold

Orange, White,
Yellow

Winter to Spring

An

0.5

0.5

Wi

Tuesday, March 27, 2007

Yes

sh
Yes
a

SD
SD,CD
SD,CD
S. Africa

Page 10 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Dodonaea viscosa & varieties

Hopbush

Green,
inconspicuous

Spring to Fall

S

15

12

Su

2

Ebenopsis ebano
(Pithecellobium flexicaule)

Texas Ebony

Cream White

Late Spring to Fall

T

30

20

Su

1

Echinocactus grusonii

Golden Barrel

Yellow

Summer

C

3

2

Su

Mex.

1

Echinocereus spp.

Hedgehog, Rainbow Cactus

Spring

C

2

2

Su

CD,SD

1

Echinopsis spp. & varieties

Easter Lily, Sea Urchin
Cactus

varies by species,
Red, Yellow, Pink,
Purple
Pink (various)

Spring to Summer

C

2

2

Su

S. Amer.

1

Encelia californica

California Brittlebush (green)

Yellow

Winter to Spring

S

4

4

Wi

c

sh

So. Calif.

1

Encelia farinosa

Brittlebush

Yellow

Early Spring

S

3

3

Wi

c

sh

SD

1

Ephedra nevadensis

Ephedra, Morman Tea

Green
inconspicuous

Spring

S

5

4

Su

3

Eragrostis intermedia

Plains Lovegrass

Light Pink, White

Summer to Fall

Gr

3

1

Su

1

Eremophila decipiens

Emu Bush

Dark red

Winter to Spring

S

5

5

Su

2

Eremophila hybrid

Summertime Blue

Blue

Spring through
Summer

S

6

6

Su,
Wi

sh

Austr.

2

Eremophila laanii 'pink beauty'

Emu Bush

Pink

Spring

S

8

8

Su,
Wi

sh

Austr.

2

Eremophila maculata 'valentine'

Valentine Emu Bush

Red

Early to late Spring

S

5

6

2

Ericameria laricifolia & cultivars
(happloppapus larcifolius)

Turpentine Bush

Yellow

Fall

S

2-3

2-3

Su

2

Eriogeron divergens

Native Fleabane

White to Lavender

Spring to Summer

Gc,An,
P

1

2

Wi

Tuesday, March 27, 2007

SD,CD
sh

Yes

CD

SD
a

SD,CD
Austr.

Austr.
SD
Yes

SW U.S.

Page 11 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Eriogonum fasiculatum v.
poliofolium

Flattop Buckwheat

White to Pink

Summer

S

1.5

2

Wi

S. CA, AZ,
UT

2

Eriogonum wrightii

Wright Buckwheat

White to Pink

Summer to early Fall

S

1.5

2

Wi

SD

1

Erioneuron pulchellum

Fluffgrass

White

Summer and Fall

Gr

.5

.5

Su

3

Eschscholtzia californica

California Poppy

Late-Spring

An

2

2

Wi

SD

3

Eschscholtzia mexicana

Mexican Gold Poppy

Orange, Pale yellow,
occasionally White

Early-Spring

An

1

1

Wi

SD

3

Eucalyptus camaldulensis

Red River Gum

Orange, paleyellow,
occasionally White
Yellow
inconspicuous

Winter to Spring

T

120

50

Su

c

2

Eucalyptus campaspe

Silver Gimlet

inconspicuous

Late Winter to Spring

T

35

25

Su

c

2

Eucalyptus formanii

Eucalyptus

White

Summer

T

20

20

Su

c

Austr.

2

Eucalyptus leucoxylon (rosea)

White Iron Bark

White, Red

Fall to Winter

T

40

30

Su

c

Austr.

2

Eucalyptus microtheca

Tiny Capsule Eucalyptus,
Coolibah

Creamy White
inconspicuous

Summer

T

35

35

Su

c

Austr.

2

Eucalyptus papuana

Ghost Gum

White
inconspicuous

Summer

T

40

25

Su

c

2

Eucalyptus polyanthemos

Silver Dollar Gum

Cream-white

Winter

T

40

30

Su

c

Austr.

2

Eucalyptus rudis

Desert Gum

T

100

50

Su

c

Austr.

2

Eucalyptus sargentii

Salt River Mallet

Yellow

T

40

30

Su

c

2

Eucalyptus spathulata

Swamp Mallee

Cream and Gold

T

20

20

Su

c

Tuesday, March 27, 2007

Summer

a

SD,CD

Austr.
sh

sh

sh

Austr.

Austr.

Austr.
Aust

Page 12 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

S

3

3

Su

CD

Gc

1

3

Wi

S. Europe,
Cnt. Asia

A,Sc

2

3

Wi

Euphorbia antisyphilitica

Wax Plant, Candelilla

2

Euphorbia myrsinites

Euphorbia

2

Euphorbia rigida (biglandulosa)

Gopher Plant

Chartreuse

Winter to Spring

2

Eysenhardtia orthocarpa

Kidneywood

White

Summer

T

10

10

Su

CD, SD

3

Eysenhardtia texana

Texas Kidneywood

White

Spring to Summer

T

8

8

Su

CD

3

Feijoa sellowiana

Pineapple Guava

White with red
stamens

Spring

T,S

15

15

Su

S. Amer.

1

Ferocactus spp.

Barrel Cactus

Varies Winter
through early Fall

C

5

1.5

Su

SD,CD

1

Fouquieria columnaris

Boojum

varies by speciesYellow, Red,
Orange, Purple
White

Late Summer to
early Fall

T,A

75

1

Wi

sh

1

Fouquieria macdougalii

Mexican Tree Ocotillo

Red

Spring

S,A

6

4

Su

t

1

Fouquieria splendens

Ocotillo

Red

Mid-Spring

A

15

8

Su

3

Fraxinus greggii

Littleleaf Ash

inconspicuous
Green

T,S

18

15

Su

2

Gaillardia aestivalis spp. winkleri

Winkler Gaillardia

P

2

3

Wi

2

Gaillardia pinnatifida

Blanket Flower

Late Spring to early
Fall

P

2

2

Wi

SW U.S.

3

Gaillardia pulchella

Fire Wheel, Blanket Flower

Late Spring to early
Fall

An

1.5

1.5

Wi

CD

3

Gazania rigens & varieties

Gazania

Winter to Spring, Fall

Gc

.5

2

Wi

Africa

Deep Maroon
center with Yellow
outside edges
Orange, Yellow,
White

Spring and mid
Summer

PT

1

Thursday, March 29, 2007

Creamy White Red centers

BLOOM SEASON

Yes

Yes

Africa

Baja
SD
SD,CD

a

CD
sh

TX

Page 13 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

3

Geijera parviflora

Australian Willow

White

Spring

T

25

20

Su

Austr.

1

Geoffroea (Gourleia)
decorticans

Chilean Palo Verde

Yellow

Spring

T

20

15

Su

S. Amer.

1

Glandularia gooddingii
(Verbena)

Goodding Verbena

Lavender, Pink

Spring

P

1.5

3

Wi,
Sp

SD

3

Glandularia pulchella
(V.tenuisecta) (V. tenera)

Moss Verbena, Rock
Verbena

Purple

Spring to Fall

P

1

5

Su,
Wi

2

Gossypium harknessii

Gossypium, Wild Cotton

Yellow

Spring and Fall

S

3

3

Su

t

SD

3

Guaiacum coulteri

Guayacan

Blue-Purple

Spring through
Summer

T,S

12

10

Su

sh

SD

1

Gutierrezia sarothrae

Snakeweed

Yellow

Early Fall

S,P

2

2

Su

3

Hamelia patens

Texas Firecracker Bush

Red, Orange

Summer

S

10

5

Su

2

Havardia mexicana
(Pithecellobium mexicanum)

Mexican Ebony

Creamy Yellow

Spring

T

30

30

Su

2

Havardia pallens
(Pithecellobium pallens)

Tenaza

White

Late Spring to MidSummer

T

30

12

Su

2

Hesperaloe campanulata

Bell Flowering Hesperaloe

Pink

Summer

A

3

3

Su

NM

2

Hesperaloe funifera

Giant Hesperaloe

Creamy White

Summer

A

5

5

Su

CD

2

Hesperaloe nocturna

Night Flowering Hesperaloe

White and Green

Spring to Fall

A

3

3

Su

SD

2

Hesperaloe parviflora &
varieties

Red Yucca, Yellow Yucca

Pink, Red, Yellow

Spring and Summer

A

3

4

Su

CD

3

Heteropogon contortus

Tanglehead

Brown

Summer and Fall

Gr

3

2

Su

Tuesday, March 27, 2007

Yes

S. Amer.

Yes

W. U.S.,
CAN, Mex.
sh

FL, Caribn.
SD

c

c

sh

Yes

Yes

CD

SD

Page 14 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Hibiscus coulteri

Yellow Hibiscus, Coulter's
Hibiscus

Pale Yellow

late Spring to Fall

S

3

3

Su

2

Hilaria berlangeri

Curly mesquite

Green

late Summer to Fall

Gr

.5

1

Su

b

SD,CD

2

Hilaria mutica

Tobosa grass

Green

Summer to Fall

Gr

2

2

Su

b

SD,CD

2

Hilaria rigida

Big galleta grass

Green

Spring through Fall

Gr

3

1

Su

b

SD,CD

1

Hyptis albida (emoryii)

Desert Lavender

Purple

Spring through Fall

S

8

8

Su

1

Jatropha cardiophylla

Limberbush

inconspicuous
White

Summer

S

3

4

Su

1

Jatropha dioica

Jatropha

inconspicuous

Summer

S

3

3

Su

3

Juniperus chinensis and
culitvars

Juniper

n/a

T

20

10

Su

b

Asia

3

Juniperus deppeana

Alligator Bark Juniper

inconspicuous

T

40

30

Su

a

SD,CD

3

Juniperus sabina

Sabine Juniper

inconspicuous

S

1.5

8

Su

b

AZ

2

Justicia californica and cultivars
(Beloperone)

Chuparosa

Red

Spring

S

3

4

Su

sh

SD

2

Justicia candicans

Red Jacobinia

Red, orange

Fall to Spring

S

5

3

Su

sh

SD

3

Justicia fulvicoma

Mexican Plume

Reddish Orange

Spring and Fall

S

2

3

Su

t

Mex.

3

Justicia spicigera

Firecracker Bush

Orange

Summer to Winter

S

4

4

Su

sh

Mex.

3

Lantana camara and cultivars

Bush Lantana

Orange,Yellow,
Red, Pink

Spring to Fall

S

3

4

Su

Tuesday, March 27, 2007

SD,CD

sh

SD
SD

t

Yes

Yes

t

CD

U.S., Tropics

Page 15 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

3

Lantana montevidensis

Trailing Lantana

Lavender

Spring to Summer

Gc

1.5

6

Su

1

Larrea tridentata (divaricata)

Creosote Bush, Greasewood

Yellow

Early Spring to Fall

S

8

8

Su

3

Leptochloa dubia

Green Sprangle-Top

Green

Summer

Gr

3

1

Su

2

Leucaena retusa

Golden Leadball

Yellow

Spring to Summer

T

20

15

Su

2

Leucophyllum spp. & varieties

Texas Ranger

Summer humidity

S

3

Linum grandiflorum `Rubrum'

Scarlet Flax

varies by species
Pink, Purple,
Lavender, White
Scarlet

Spring

An

2

3

Linum lewisii

Blue Flax

Bright Blue

Spring

An

1

Lophocereus schotti

Senita

Pink

Spring to Summer

1

Lophocereus schotti, ssp.
Monstrosus

Totem Pole Cactus

Pink

2

Lotus rigidus

Desert Deerweed, Deer
Vetch

1

Lupinus arizonicus

1

INV

SCA HARDY
t

ORIGIN
S. Amer.
SD,CD

a

CD,SD
sh

CD

Su

CD

1

Wi

N. Africa

2

1

Wi

SD,CD

A, C

15

10

Su

Spring to Summer

A, C

10

8

Su

Baja

Yellow and Orange

Spring

Gc,P

1.5

2

Wi

SD

Lupine

Purple

Winter to Spring

An

1

1

Wi

SD

Lupinus sparsiflorus

Desert Lupine

Purple

Late Winter to Spring

An

1

1

Wi

SD

1

Lupinus succulentus

Arroyo Lupine

Deep Blue

Spring

An

2

1

Wi

SD

2

Lycium andersonii

Desert Wolfberry

Lavender, followed
by Red berries

Spring

S

6

6

Su

SD

1

Lycium exsertum

Thornbush

White-Purple
followed by Red
berries

Spring

S

8

8

Su

SD

Tuesday, March 27, 2007

3-10 3-10

AL

sh

SD

Page 16 of 30

WU

BOTANICAL NAME

COMMON NAME

1

Lycium fremontii

Wolfberry, Tomatillo

2

Lycium pallidum

Desert Thorn

3

Lysiloma thornberi

2

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

White-Lavender
followed by Red
berries

Spring

S

10

8

Su

SD

White, followed by
Red berries

Spring

S

3-9

4-6

Su

SD, Mojave D

Feather Tree

White

Late Spring

T,S

20

20

Su

Yes

Yes

Macfadyena unguis-cati

Cat's Claw Vine

Yellow

Spring

V

30

30

Su

Yes

Yes

1

Maireana sedifolia

Pearl Bluebush

Tan inconspicuous

S

2

3

2

Malephora crocea

Croceum, Ice Plant

Copper to red

Late Fall to late
Winter

Gc,Sc

1

6

Su

3

Malephora lutea

Rocky Point Ice Plant

Yellow

Nearly all year

Gc, P

8

4

Su

1

Mamillaria spp.

Pincushion, Fishhook Cactus

Varies by species
Spring to Summer

C

0.5

0.5

Su

CD, SD

2

Maytenus phyllanthoides

Mangle Dulce

varies by species
Cream, Yellow,
Red, Pink

S

12

12

Su

SD,CD

2

Melampodium leucanthum

Blackfoot Daisy

White

Early Spring to Fall

Gc

2

2

Su

2

Merremia aurea

Yellow Morning Glory Vine

Yellow

Summer to Fall

V

25

25

Su

2

Mimosa dysocarpa

Velvetpod

Pink, White

Summer

S

6

6

Su

3

Mirabilis multifora

Desert Four O'clock

Hot Pink

Summer to early Fall

Gc,P,V

3

4

Su

U.S.

3

Muhlenbergia capillaris

Regal Mist

Pink

Fall

Gr

3

3

Su

U.S.

3

Muhlenbergia dumosa

Bamboo Muhly

Green dries to tan

Spring to Summer

Gr

6

6

Su

Tuesday, March 27, 2007

Green
inconspicuous

sh

SD
U.S.

sh

Austr.
S. Africa

sh

Yes

Yes

SD,CD
t

c

a

S. Africa

SD
SD

SD

Page 17 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Muhlenbergia emersleyi

Bullgrass

Purple dries to tan

Fall

Gr

4

4

Su

a

SD

3

Muhlenbergia lindheimeri

Autumn Glow

Yellow dries to tan

Fall

Gr

5

5

Su

a

TX

1

Muhlenbergia porteri

Bush muhly

Pink

Late Summer to Fall

Gr

2

3

Su

a

SD,CD

2

Muhlenbergia rigens

Deer grass

Tan

Summer to Fall

Gr

4

4

Su

a

SD

3

Muhlenbergia rigida

Purple Muhlenbergia

Purple dries to tan

Late Summer to Fall

Gr

5

3

Su

a

SD

3

Myoporum parvifolium

Purple Myoporum

White

Spring to Summer

Gc

0.5

9

Su

Austr.

3

Myrtus communis & varieties

True Myrtle, Roman Myrtle

White

Spring

S

6

5

Su

Medit.

3

Nandina domestica & varieties

Heavenly Bamboo

White followed by
Red berries

Spring

S

6

4

Su

Asia

2

Nassella tenuissima

Mexican Feather Grass

Tan

Fall

Gr

3

1

Su

2

Nerium oleander & varieties

Oleander

Pink, White, Red,
Salmon

Mid-Spring to Fall

S

1

Nolina beldingii

Belding's Nolina

White

1

Nolina bigelovii

Beargrass

Cream

1

Nolina lindheimeriana

Lindheimer's Nolina

White

1

Nolina matapensis

Tree Beargrass

White

1

Nolina microcarpa

Beargrass

Greenish White

Tuesday, March 27, 2007

4-20 5-12

Su

b
Yes

CD
sh

Asia

A

3

6

Wi

Baja

A

6

4

Su

SD

A

3-4

2-3

Su

TX

Summer

A

25

6

Su

SD

Summer

A

3

6

Su

SD

Summer

Page 18 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

1

Nolina nelsoni

Blue Nolina

Green

1

Nolina parryi

Parry's Beargrass

1

Nolina texana

Bear Grass

White

Late Spring

2

Oenothera berlandieri
(speciosa)

Mexican Evening Primrose

Pink

2

Oenothera caespitosa

White Evening Primrose,
Tufted Evening Primrose

2

Oenothera stubbei

2

PT
A

H

W

4-5 6-10

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

Su

Mex.

A

5

5

Su

SD

A

3

3

Su

TX, NM

Spring to Fall

Gc, P

1

3

Su,
Wi

White

Spring

Gc, P

1

3

Wi,
Sp

Chihuahuan Primrose

Yellow

Summer to Fall

Gc, P

1

2

Su,
Wi

Olea europaea 'Swan Hill',
'Wilsoni'

Fruitless non-polinating Olive

White

Spring

T

30

30

Su

1

Olneya tesota

Desert Ironwood, Tesota

Lavender-Pink

Late Spring to early
Summer

T

30

25

Su

1

Opuntia basilaris

Beavertail Prickly Pear

Hot Pink

Mid Spring

C

2

4

Su

SD

1

Opuntia bigelovii

Teddy Bear Cholla

Green

Early Spring

C

6

3

Su

SD

1

Opuntia engelmanii

Engelmann's Prickly Pear

Orange, Yellow

Spring

C

5

6

Su

SW. U.S.,
Mex.

1

Opuntia ficus-indica

Indian Fig

Yellow

Spring

C

1015

15

Su

1

Opuntia microdasys

Rabbit Ears Prickly Pear

Yellow

Spring

C

3

6

Su

1

Opuntia santa rita tubac

Purple Pancake

Yellow

Spring

C

6

4

Su

AZ cultivar

1

Opuntia turpinii

Pinecone Prickly Pear

Pink

Summer

C

3

1

Su

W. Argentina

Tuesday, March 27, 2007

Yes

Yes

sh

CD, TX, Mex.
W. U.S.

sh

SD, NE Mex.
Medit.

sh

sh

SD,CD

Mex.

Page 19 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

1

Opuntia versicolor

Staghorn Choll

Orange, Red,
Yellow

Spring

C

10

6

Su

SD

1

Opuntia violacea macrocentra

Long Spine Prickly Pear

Yellow, Red

Spring to early
Summer

C

2

3

Su

SD

1

Opuntia violacea 'Santa Rita'

Santa Rita Prickly Pear

Yellow

Spring

C

4

4

Su

AZ

3

Osteospermum fruticosum

Trailing African Daisy

White, Purple

Winter to Spring

Gc

1

4

Wi

c

2

Pappophorum mucronulatum

Pappusgrass

White

Spring to early Fall

Gr

3

2

Su

a

2

Parkinsonia praecox
(Cericidium)

Palo Brea

Yellow

Spring

T

30

25

Su

b

2

Parkinsonia florida (Cercidium
floridum)

Blue Palo Verde

Yellow

Early Spring

T

30

30

Su

b

2

Parkinsonia hybrid "Desert
Museum"

Desert Museum Palo Verde

Yellow

Spring to Summer

T

30

30

Su

b

SD,CD

1

Parkinsonia microphylla
(Cercidium microphyllum)

Littleleaf or Foothill Palo
Verde

Yellow

Late Spring

T

20

20

Su

b

SD

1

Parkinsonia x sonorae
(Cercidium)

Sonoran Palo Verde

Yellow

Spring

T

20

20

Su

b

SD

2

Passiflora foetida

Passion Flower

White, Purple

Summer

V

10

10

Su

1

Pedilanthus macrocarpus

Slipper Flower, Lady's
Slipper, Candelilla

Red-Pink

Spring and Fall

A,Sc

3

3

Su

2

Pennisetum setaceum
`Cupreum'

Purple Fountain Grass

Pink, Purple

Summer

Gr

4

5

Su

2

Penstemon ambiguus

Pink Plains Penstemon

Pink

Summer

P

3

3

Su

W. U.S.

3

Penstemon amphorellae

Blue

Late Spring

P

1

2

Su

Central Mex.

Tuesday, March 27, 2007

sh

SD
sh
Yes

Yes
Yes

Africa

Yes

Yes

SD
SD

sh

SD
SD

b

Africa

Page 20 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

3

Penstemon baccharifolius

Cutleaf Penstemon

Red-Rose

Summer

P

2

3

Su

CD

3

Penstemon barbatus

Beardtongue Penstemon

Red

Summer to early Fall

P

1

1

Wi

SD,CD

3

Penstemon cardinalis

Cardinal Penstemon

Red

Spring, Summer

P

1

1-2

Wi

TX

3

Penstemon cobaea

Foxglove Penstemon

White-lavender

Spring

P

1

1

Wi

TX?

3

Penstemon eatoni

Firecracker Penstemon

Red

Late Winter to Early
Spring

P

1

1

Wi

SD

3

Penstemon fendleri

Fendler Penstemon

Violet

Spring through
Summer

P

1

1

Wi

OK, AZ, NM

3

Penstemon grandiflorus

Large Fendler Penstemon

Lavender

Early Summer

P

1

1

Wi

TX

3

Penstemon palmeri

Palmer Penstemon

White, Pink

Spring through
Summer

P

2

2

Wi

SW U.S.

3

Penstemon parryi

Parry Penstemon

Pink, Red

Early Spring

P

1

1

Wi

3

Penstemon pinifolius

Pineleaf Penstemon

Red, Orange

Summer

P

1

2

Su

No. AZ, UT

3

Penstemon pseudospectabilis

Canyon Penstemon,
Mohave Beardtongue

Rose-purple

Spring to midSummer

P

1

1

Wi

SD

3

Penstemon spectabilis

Mojave Penstemon, Royal
Penstemon

Blue-purple

Spring to midSummer

P

1

1

Wi

CA, N. Baja
Mex.

3

Penstemon strictus

Rocky Mountain Penstemon

Blue

Early Summer

P

1

1

Su

W. U.S.

Penstemon subulatus

Little Beardtongue

Red

Spring

P

1

1

Wi

SD

Penstemon superbus

Superb Penstemon, Santa
Rita Penstemon

Coral-red

Spring

P

2

2

Wi

CD, SD, N.M.

3

Tuesday, March 27, 2007

Yes

Yes

SD

Page 21 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

3

Penstemon triflorus

Hill Country Penstemon

Rose

Early Spring

P

1

1

Wi

TX

3

Penstemon wrightii

Texas Rose, Wright's
Penstemon

Orange- Pink

Spring to Summer

P

1

1

Wi

TX

1

Pentzia incana

Karoo Bush

Yellow

Spring to Summer

Gc

1

3

Su

2

Phacelia campanularia

Desert Bluebells, Desert
Canterbury Bells

Blue

Early Spring

An

1

1

Wi

SD

2

Phacelia tanacetifolia

Tansy Phacelia

Blue, Purple

Early Spring

An

1

1

Wi

N. Calif., N.
Baja

2

Phoenix canariensis

Canary Island Date Palm

Cream, White

Summer

T

60

30

Su

c

Canary
Islands

2

Phoenix dactylifera

Date Palm

insignificant

Summer

T

100

20

Su

c

Asia

3

Phyla nodiflora

Lippia

White

Summer

Gc

.125 0.5

Su

2

Pinus edulis

Piñon Nut Pine

insignificant

T

25

15

Su

c

NM, Calif, AZ

2

Pinus eldarica

Afghan Pine

insignificant

T

50

25

Su

c

Asia

2

Pinus halepensis

Aleppo Pine

insignificant

T

80

60

Su

c

Medit.

2

Pinus monophylla

Singleleaf Piñon Pine

insignificant

T

25

15

Su

c

Mojave D, N.
AZ

2

Pinus pinea

Italian Stone Pine

insignificant

T

60

50

Su

c

Medit.

3

Pinus roxburghii

Chir Pine

insignificant

T

80

40

Su

c

Asia

2

Pistacia atlantica

Mt. Atlas Pistache

insignificant
greenish white

T

60

50

Su

c

Medit.

Tuesday, March 27, 2007

Early Summer

Yes

Yes

S. Africa

sh

Trop.
America

Page 22 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

T

30

30

Su

c

T

60

50

Su

c

T

30

30

Su

c

T

20

15

Su

Austr.

S

6

10

Su

Asia

3

Pistacia atlantica x integerrima

Pistache hybrid tereb. x
integerrima

3

Pistacia chinensis

Chinese Pistache

2

Pistacia vera

Pistachio

2

Pittosporum phillyraeoides

Willow Pittosporum

Yellow

3

Pittosporum tobira & cultivars

Mock Orange

White

1

Plantago spp.

Indian Wheat

Cream, White

Spring

An

.252

0.5

Wi

SD,CD

3

Poliomintha maderensis

Lavendar Spice

Lavender

Spring through
Summer

S

2

2

Su

CD

3

Portulacaria afra

Elephant Food

Pink inconspicuous

rarely blooms in U.S.

Sc

12

12

Su,
Wi

2

Prosopis hybrid

South American Mesquite

Light Yellow

Spring

T

40

40

Su

b

S. Amer.

2

Prosopis glandulosa & varieties

Texas Honey Mesquite

Creamy Yellow

Spring

T

30

30

Su

b

CD

2

Prosopis pubescens

Screwbean Mesquite

Yellow

Spring

T

20

20

Su

b

SD,CD

2

Prosopis velutina (juliflora)

Velvet Mesquite

Yellow

Spring

T

30

30

Su

b

SD

1

Psilostrophe cooperi

Paper Flower

Yellow

Spring and Summer

P

2

2

Wi

SD,CD

1

Psilostrophe tagetina

Paper Flower

Yellow

Spring and Summer

P

2

2

Wi

SD,CD

3

Punica granatum & varieties

Pomegranate

Dark Orange, Red

Summer

T,S

20

15

Su

India

Tuesday, March 27, 2007

Green (Red
leaves) Fall color

Spring

t

ORIGIN
Medit. x Asia
Asia

t

t

Asia

S. Africa

Page 23 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

H

W

GS TOXIC

S

20

12

Su

AL

INV

SCA HARDY

ORIGIN

3

Pyracantha & varieties

Pyracantha (red berried
types)

White followed by
Red berries

3

Quercus arizonica

Arizona White Oak

Green
inconspicuous

T

60

30

Su

b

SD,CD

3

Quercus buckleyi (Q texana)

Texas Red Oak

T

30

30

Su

b

W. TX

3

Quercus emoryi

Emory Oak

Green
inconspicuous;
Red Fall Color

Green
inconspicuous

T

50

40

Su

b

SD,CD

3

Quercus fusiformis

Escarpment Live Oak

Green
inconspicuous

T

50

50

Su

b

W. TX

3

Quercus gambelii

Gambel Oak

Green
inconspicuous

T,S

30

15

Su

b

SW U.S.

3

Quercus ilex

Holly Oak

Green
inconspicuous

T

50

50

Su

b

Medit.

3

Quercus muhlenbergia

Chinquapin Oak

T

30

30

Su

b

W. TX

3

Quercus polymorpha

Monterey Oak

Green
inconspicuous,
Orange and
Green
inconspicuous

T

80

60

Su

b

W. TX

3

Quercus suber

Cork Oak

Green
inconspicuous

T

60

40

Su

b

Medit.

2

Quercus turbinella

Shrub Live Oak

Green
inconspicuous

S

10

10

Su

b

W. U.S.

3

Quercus virginiana

Live Oak

Green
inconspicuous

T

50

50

Su

b

SE U.S.

2

Rhus microphylla

Littleleaf Sumac

White, Red Fall
Color

Spring before leaves

S

10

10

Su

Yes

c

CD, SD

2

Rhus ovata

Sugar Bush, Sugar Sumac

Spring

S

15

15

Wi

Yes

c

Calif., AZ

2

Rhus trilobata & varieties

Three Leaf Sumac, Skunk,
Bush

Pink & White
followed by small
red fruit

Spring

S

5

8-10

Su

c

Can.,U.S.,
Mex.

Tuesday, March 27, 2007

inconspicuous,
small red fruit, Fall
color

Spring

PT

Asia

Page 24 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL
c

SCA HARDY

ORIGIN

2

Rhus virens

Evergreen Sumac

White followed by
showy berries

Spring

S

12

12

Su

3

Rosa banksiae

Lady Banks Rose,
Tombstone Rose

White, Yellow

Spring

S,Gc,V

20

20

Su

China

2

Rosmarinus officinalis &
varieties

Rosemary

Blue

Spring and Fall

S

3

8

Su

Medit.

3

Ruellia brittoniana & varieties

Dwarf Ruellia

Blue, White

Throughout warm
season

Gc

6

12

Su

sh

Mex.

2

Ruellia californica

Sonoran Desert Ruellia

Blue, Purple

Late Spring to Fall

S

4

4

Su

sh

SD

2

Ruellia peninsularis

Baja Ruellia

Blue, purple

Spring to Summer

S

4

4

Su

sh

SD

2

Ruschia uncinatus

Ruschia

Pink

Summer

Gc,Sc

1.5

1.5

Su

S. Africa

2

Salvia chamaedryoides

Blue Chihuahuan Sage

Cobalt blue

Spring and Fall

S

2

2

Su

CD

2

Salvia clevelandii

Cleveland Sage

Blue

Late Spring to
Summer

S

5

5

Wi

S. CA, Baja

3

Salvia columbariae

Chia

Blue

Spring

An

.5

.25

Wi

SD

2

Salvia dorri v. dorrii

Mojave Sage

Blue-violet

Late Winter and
Spring

S

2

2

Wi

MD

3

Salvia farinacea

Mealy Cup Sage, Texas
Violet

Violet, Blue, White

Spring to early Fall

S

1

1

Su

CD

3

Salvia greggii

Red Chihuahan Sage,
Autumn Sage

Red, Hot Pink,
Purple, White

Spring to Summer

S

3

3

Su

CD

2

Salvia hybrid (S.dorrii x
S.clevlandii x S.mojavensis)

Trident, Carl Nielson Sage

Cobalt Blue

Spring

S

3

3

Wi

SD hybrid

3

Salvia leucantha

Purple Mexican Bush Sage

Purple

Spring to Fall

S

4

4

Su

Tuesday, March 27, 2007

Yes

INV

CD, SD

sh

Mex.

Page 25 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Salvia mohavensis

Mohave Sage

Lavender

Spring to midSummer

S

3

3

Wi

SD, MD

3

Sambucus nigra spp. Cerulea
(S.mexicana)

Mexican Elderberry

Creamy White

Winter and Spring

T

30

20

Wi

SD,CD

2

Santolina chamaecyparissus

Lavender Cotton

Yellow/ silvery
foliage

Spring

S,Gc

2

3

Wi

Medit.

3

Santolina virens

Green Santolina

Creamy Yellow

Spring

S,Gc

2

2

Wi

Medit.

3

Sapindus sapnaria saponaria

Soapberry

Creamy White

Late Spring

T

30

30

Su

Yes

2

Sapindus sapnaria drummondii

Soapberry

Creamy White

Late Spring

T

30

30

Su

Yes

3

Schinus molle

California Pepper Tree

Yellow-white
(insignificant)

Summer

T

40

45

Su

2

Senecio cineraria

Dusty Miller, Silver Plant

Yellow/silvery
foliage

Spring

P

2

2

Wi

1

Senna covesii (Cassia)

Desert Senna

Yellow

Late Spring to early
Fall

P

1

1

Su

2

Senna lindheimeriana (Cassia)

Senna

Yellow

Summer to Fall

S

3

2

Wi

sh

CD

1

Senna purpussi (Cassia)

Baja Senna

Yellow

Winter to Spring

S

6

5

Wi

sh

Baja

2

Senna wislizenii (Cassia)

Cassia, Shrubby Senna

Yellow

Summer

S

8

8

Su

2

Sesuvium verrucosum

Sea Purslane, Ice Plant

Pink

Early Spring to Fall

Gc

0.5

3

Su

1

Simmondsia chinensis &
varieties

Jojoba, Goat Nut

Green
inconspicuous

Spring

S

8

8

Wi

2

Sophora secundiflora & varieties

Texas Mountain Laurel

Purple to Lavender

Spring

T,S

25

15

Su

Tuesday, March 27, 2007

sh

Mex.
SD,CD

b

S. Amer.

Yes

Medit.
SD

SD,CD
t
a
Yes

Africa
SD
CD

Page 26 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

Orange, White,
Red, Purple,
Lavender

Early Spring and Fall

P

3

3

Wi

White

Summer

Gr

5

3

Su

a

SD,CD

Summer to Fall

Gr

3

1

Su

a

SD,CD

Gr

2

1

Su

a

SD,CD

2

Sphaeralcea ambigua &
varieties

Globe Mallow

1

Sporobolus airoides

Alkali Sacaton

1

Sporobolus contractus

Spike Dropseed

White

3

Sporobolus cryptandrus

Sand Dropseed

White

2

Sporobolus flexuosus

Mesa Dropseed

White

Summer to early Fall

Gr

3

1

Su

a

SD,CD

3

Sporobolus wrightii

Big Sacaton

Green

Late Summer to Fall

Gr

5

4

Su

a

SD,CD

1

Stenocereus thurberi
(Lemaireocereus)

Organ Pipe Cactus

White, Purple

Summer

C

15

12

Su

t

1

Stenocereus marginatus
(pachycereus)

Mexican Fence Post

Mid-Spring

A, C

12

1

Su

sh

3

Tagetes lemmoni

Mountain Marigold

Pink or Red
outside- whitish
inside
Orange, Yellow

Spring and Fall

P

3

6

Su

2

Tecoma stans v. angustata

AZ Yellow Bells

Yellow

Late Spring to Fall

S

10

8

Su

sh

SD,CD

3

Tecomaria capensis

Cape Honeysuckle

Orange

Late Fall to Winter

S,V

8

6

Su

sh

Africa

2

Tetraneuris acaulis
(Hymenoxys)

Angelita Daisy

Yellow

All Year, heaviest in
Spring

P

1

1

Su

2

Teucrium chamaedrys
(prostratum)

Prostrate Germander

Lavender

Spring and Summer

Gc

1

2

Su

2

Teucrium fruticans

Bush Germander

Blue or Lavender

Spring to Fall

S

8

8

Su

Medit.

2

Thymophylla pentachaeta
(Dyssodia)

Golden Dyssodia, Golden
Fleece

Yellow

Late Spring to Fall

Gc

0.5

0.5

Su,
Wi

SD,CD

Tuesday, March 27, 2007

SD

SD
Mex.
SD

SW U.S.
Yes

Medit.

Page 27 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Thymophylla acerosa
(Dyssodia)

Scrubby Dogweed

Yellow

Late Spring to early
Fall

Gc

.5

.5

Su

2

Trichloris crinita

Two-feather Trichloris

White dries to Tan reddish highlights

Late Spring to Fall

Gr

3

1

Su

2

Trichocereus & varieties

Trichocereus Cactus

White, Yellow,
Oragne, Red

Varies by variety
Spring, Summer, Fall

C

2

Tridens muticus

Slim Tridens

White

Spring to Fall

Gr

1.5

0.5

Su

2

Trixis californica

Trixis

Yellow

Spring

S

3.5

3.5

Su

3

Ungnadia speciosa

Mexican Buckeye

Rose-pink

Spring

T

12

12

Su

CD

2

Vauquelinia californica &
varieties

Arizona Rosewood

White

Spring to Summer

T,S

25

15

Su

SD

2

Vauquelinia corymbosa &
varieties

Mexican Rosewood

White
inconspicuous

Spring

S

15

20

Su

TX, Mex.

3

Verbena peruviana

Peruvian Verbena

Pink, Blue, Purple

Spring to Fall

P

0.2

3

Su

S. Amer.

3

Verbena rigida

Sandpaper Verbena

Purple

Summer to Fall

Gc,P

2

4

Su

Yes

S. Amer.

3

Verbena tenuisecta 'Edith'

Moss Verbena

Lavender, Purple

Spring

Gc P

1-2

4-5

Su,
Wi

Yes

S. Amer.

2

Verbesina encelioides

Crown Beard

Yellow

Spring

An

3

3

Wi

Yes

SD,CD

2

Viguiera parishii (V deltoidea)

Goldeneye

Yellow

Spring, Late Summer

P

3

3

Wi,
Su

3

Viguiera stenoloba

Skeleton-leaf Goldeneye

Yellow

Summer to Fall

S

4-6

3-4

Su

2

Vitex agnus-castus

Chaste Tree, Monk's Pepper

Blue

Summer to Fall

T,S

25

25

Su

Tuesday, March 27, 2007

1-15 1-5

SD,CD
a

SD,CD

Su

S. Amer.,
Argentina
b

SD,CD
sh

CA to TX

SD
sh

TX, NM, No.
Mex.
Medit.

Page 28 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Washingtonia filifera

California Fan Palm

Cream

Summer

T

45

15

Su

c

Yes

2

Washingtonia robusta

Mexican Fan Palm

Cream

Summer

T

75

10

Su

c

Yes

sh

SD

3

Wedelia texana and cultivars
(Zexmenia hispida)

Rough Zexmenia, Devil's
River

Orange, Yellow

Spring through Fall

S

2-3

2-4

Su

Yes

sh

SW U.S., TX

3

Xylosma congestum

Xylosma

insignificant

Spring

T,S

15

15

Su

China

2

Yucca aloifolia

Spanish Bayonet Yucca

White

Spring to Summer

A

10

5

Su

SD

1

Yucca baccata

Banana Yucca

White

Late Spring to
Summer

A

3

5

Su

SD,CD

2

Yucca baileyi

White

Summer

A

4

2

Su

CO, UT

1

Yucca brevifolia

Joshua Tree

White, Green

Late Winter to early
Spring

A

20

20

Wi

S. Calif,
S.W. Utah

2

Yucca constricta

Buckley Yucca

White

Spring through
Summer

A

5

5

Su

TX

2

Yucca elata

Soaptree Yucca

White

Late Spring to
Summer

A

20

8

Su

SD,CD

2

Yucca faxoniana (Y
carnerosana)

Giant Dagger Yucca

White

Summer

A

15

4

Su

CD

2

Yucca filifera (australis)

St. Peter's Palm

White

A

2.5

4

Su

Mex.

2

Yucca glauca

Soapweed Yucca

White

Summer

A

3

3

Su

U.S.

2

Yucca harrimaniae

Harriman's Yucca

White

Mid-Summer

A

6-22

18

Su

SW U.S.

2

Yucca pallida

Paleleaf yucca

White

Late Spring

A

2

2

Su

TX

Tuesday, March 27, 2007

SD

Page 29 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS TOXIC

AL

INV

SCA HARDY

ORIGIN

2

Yucca rigida

Mexican Blue Dagger Yucca

White

Summer

A

12

5

Su

CD

2

Yucca rostrata

Beaked Yucca

White

Summer

A

12

9

Su

CD

2

Yucca schidigera

Mojave Yucca

White

Spring

A

Su

W. U.S, Mex.

2

Yucca schottii

Mountain Yucca

White

Early Summer

A

15

4

Su

SD

2

Yucca thompsoniana

Thompson Yucca

White

Early Summer

A

10

5

Su

SW TX

2

Yucca torreyi

Torrey's Yucca

White

Spring

A

8-15

6

Su

TX, NM, No.
Mex.

1

Yucca treculeana

Spanish Dagger, Palma Pita

White

Spring

A

20

?

Su

CD, W. TX

1

Yucca whipplei

Our Lord's Candle

White & Purple

Once (Early-Spring)

A

3

6

Su

SD

3

Zauschneria californica &
varieties

Hummingbird Trumpet

Red, Orange

Summer and Fall

Gc

2

2

Su

SD

3

Zephyranthes spp. & varieties

Rain Lily

varies by speciesWhite, Rose, Pink

Summer

Gc,P

1

1.5

Su

S. Africa

1

Zinnia acerosa

Desert Zinnia

White-orange
centers

Late Spring to Fall

P

1

1

Su

SD,CD

2

Zinnia grandiflora

Prairie Zinnia

Yellow, Orange

Summer to Fall

P

1

1

Su

SE. AZ, NM

2

Zizyphus jujuba

Chinese Date, Common
Jujube

Yellow-white

Spring

T

40

30

Su

Tuesday, March 27, 2007

9-15 4-6

Yes

Asia

Page 30 of 30

D rop Your Water Use

!

Low Water Use/Drought Tolerant Plant List
sorted alphabetically by water use number

Photos - Christina Bickelmann2007

Arizona Department of Water Resources,
(520) 770-3800
www.azwater.gov/tama

Tucson Active Management Area
400 W. Congress, Suite 518
Tucson, AZ 85701

D

!

ROP YOUR WATER USE

Tucson is Educating Consumers to Drop their Water Use . . .
The Tucson office of the Arizona Department of Water Resources (ADWR) has developed a new
pilot program, Drop Your Water Use, to educate retail nursery customers on how to plan and
maintain a healthy and water efficient landscape.
The program is a voluntary collaboration between ADWR and local nurseries that uses a simple
water drop system to identify plants with similar water requirements. Plants are labeled one
through three, distinguished with corresponding water drops and numbers.
All of the labeled plants are Xeriscape plants currently on the Tucson AMA -Low Water Use/
Drought Tolerant plant list. The one through three numbering system correlates with the plant list.

A “number one” indicates very low water use
mostly native Sonoran and Chihuahuan desert plants,
Two is low water use,
Three is moderate water use.
By choosing plants with the same number a gardener can more successfully group plants by
water needs.
Although the plants are all low-water-using, the frequency that they need to be irrigated varies
from approximately once a week to once a month after the plants are established (in about 2-3
years). ADWR hopes that consumers will use separate valves on their irrigation system to water
each zone and irrigate trees separately, enabling them to manage their irrigation water use more
efficiently.
To date, fourteen Tucson retail nurseries and all six Tucson area Home Depot’s have signed up
for the program. ADWR is working with other nurseries to encourage them to
participate.Wholesale nurseries in Phoenix and Tucson are also participating in the program by
adding water drop symbols to the labels on plants to be sold in Tucson.
Retail nurseries that participate receive free posters, water drop stickers for their signage and
handouts for their customers explaining the program and watering guidelines. In addition all
participating nurseries will be listed on the ADWR website and will be promoted in press releases
and at community events.
Anyone interested in more information or Tucson nurseries that would like to sign up for the
program should contact Christina Bickelmann, Water Conservation Specialist for the Tucson
ADWR office @ (520) 770-3816 or email: clbickelmann@azwater.gov.

LOW WATER USE/DROUGHT TOLERANT PLANT LIST
OFFICIAL REGULATORY LIST FOR:

Arizona Department of Water Resources - Tucson Active Management Area
Pima County, City of Tucson, Town of Oro Valley,
Town of Marana, Town of Sahuarita
This official regulatory list was developed to guide the regulated community in choosing low water-use and
drought tolerant plants for landscaping. Landscaping planted after January 1, 1987 within publicly owned
rights-of-way and irrigated with groundwater may be planted only with plants listed on the ADWR Low Water
Use/ Drought Tolerant Plant List for the Tucson AMA. The director may waive this requirement under
special circumstances. This requirement does not apply to any portion of a residential lot that extends into a
publicly owned right-of-way. Many local jurisdictions have adopted this list for regulatory purposes; contact
your local jurisdiction for their landscape requirements.
This list can also be used as a resource for residents and businesses that are interested in conserving water. The list provides a
wide array of plants to accomplish a variety of low water-use landscape designs.
The plants on this list can be grown in the Tucson area with very low to moderate supplemental irrigation once they are
established. Supplemental irrigation should be of sufficient quantity to saturate the plant’s root zone. All plants listed can grow with
less water than traditional high water-use landscape plants and do not require more than the ADWR regulations for low water-use
plants in the Tucson AMA, a maximum of 18 inches of supplemental irrigation on an annual basis, not including rainfall. In
addition to water requirements, other suitability factors (e.g. highly invasive, cold hardiness, etc.) may be considered to determine
acceptability of individual plants for addition to the list.

Note regarding Native plants: plants may be available at local nurseries, botanical gardens or from cactus
and succulent plant rescue groups. Any person moving a protected native plant in Arizona and transplanting
it to another location shall apply to the Arizona Department of Agriculture for a Movement Permit.
www.azda.gov/rules/R3-3-1107.htm.
Applications for additions, deletions or exceptions: to this list may be submitted to the Department of
Water Resources, Tucson Active Management Area Office for consideration. Phone: (520) 770-3800. The
list and application forms may be downloaded from the ADWR website at www.azwater.gov/TAMA.
An advisory committee of local plant experts reviews all applications for modification and submits
recommendations to the AMA Director for final consideration.

Key to symbols:
Water use (WU)
1 – Very low, irrigate every 3-6 weeks during the growing season after establishment
2 – Low, irrigate every 2-4 weeks during the growing season after establishment
3 – Moderate, irrigate 1-3 weeks during the growing season after establishment

Average annual rainfall for Tucson is 11-12”; in low rainfall years the plants on the list may need additional irrigation
to maintain good appearance and plant health.

Irrigation: most plants require regular irrigation during the first 2- 3 year establishment period. Plants should be
watered to their root depth. Mature trees should be watered to a depth of 24”-36”; Shrubs 18”- 24”; Groundcovers
and Vines 8”-12”. Winter growers will require less frequent irrigation due to the cooler temperatures.
*

Growing Season (GS):
Wi winter – apply water September through March; less frequently in off season
Su summer – apply water March through September; less frequently in off season
Flower Color:
S
shrub

Includes annotations for fall color,

Sc succulent
H: Mature plant height measured in feet
V vine
W: Mature canopy size measured in feet
P perennial

tree

Plant Type (PT):
A accent plant
berries
C cactus
Gc groundcover
Gr ornamental grass
An annual
Cold Hardiness: if plants do not suffer any
damage at 25º F or below they are considered
cold hardy in our region. Approximate freezing
temperatures are provided in degrees Fahrenheit.

T

Allergenicity (AL):
a strongly allergenic
b moderately allergenic
c weakly allergenic

Note: the timing of the freeze, duration of the freeze, the temperatures the next day and the second night
temperatures will affect how severely damaged the plant will be.
Allergenicity of the plants was classified with the help and advice of Michael J. Schumacher, M.D., Professor, Dept. of
Pediatrics and Head, Allergy-Immunology Section, Univ. of Arizona Health Sciences Center and Mark R. Sneller,
Ph.D., Office of Pollen and Mold Control, Pima County Health Dept.
Native Plants are listed under Origin using the following symbols:
CD
Chihuahuan Desert- includes north central and NW Mexico, SW Texas, southern New Mexico and extreme SE
Arizona
SD
Sonoran Desert – includes arid and semi-arid areas of NW Mexico, SE California and most of Arizona
south of the Mogollon Rim
Note: Chihuahuan and Sonoran Desert Regions annotated by Matt Johnson, Native Plant Society.

Special Considerations:
Toxic: may be harmful if eaten. Call Arizona Poison Control Center at 626-6016
Invasive (INV): may spread and intrude into natural areas
Spreads in Cultivated Areas (SCA): may spread by seed or sucker in urban or cultivated areas, and in disturbed
soils
Updated February 2010

Low Water Use Drought Tolerant Plant List - Tucson Active Management Area
WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

Yes

Yes

5

SD,CD

15

Austr.

0

SD,CD

1

Acacia constricta

Whitethorn, Mescat Acacia

Yellow

Spring to Summer

T,S

20

20

Su

c

1

Acacia crasspedocarpa

Waxleaf Acacia

Yellow

Spring to Summer

T,S

15

15

Su

c

1

Acacia greggii

Catclaw Acacia

Creamy Yellow

Spring to Summer

T,S

15

20

Su

c

1

Agave americana & varieties

Century Plant

Yellow

Once (Summer)

A,Sc

7

8

Su

20

CD

1

Aloe barbadensis

Aloe Vera, Medicinal Aloe

Yellow, Orange, Red

Late Winter to
Summer

Sc

2

2

Wi

25

Africa

1

Aloe saponaria

Tiger Aloe, Mediterranean Aloe

Yellow, Orange, Red

Winter to Spring

Sc

1

1

Wi

15

Africa

1

Ambrosia deltoidea (Franseria)

Triangle-leaf Bursage

inconspicuous

Mid-Winter to midSpring

S

2

2

Wi

a

22

SD

1

Ambrosia dumosa (Franseria)

White Bursage

inconspicuous

Mid-Winter to midSpring

S

2

2

Wi

a

22

SD

1

Asclepias subulata

Desert Milkweed

Pale Yellow, White

Late-Spring to Fall

P

3

3

Su

20

SD

1

Aster bigelovii

Purple Aster

Blue

Late-Summer to
early Fall

An

1-3

.5

Su

0

SD

1

Aster tanacetifolius

Purple Aster

Purple

Summer to Fall

An

1.5

.5

Su

0

SD,CD

1

Atriplex canescens

Four-Wing Saltbush

inconspicuous

Spring to Fall

S

4

8

Su

a

15

SD,CD

1

Atriplex nummularia

Old Man Saltbush

inconspicuous

S

9

15

Su

a

15

Austr.

1

Atriplex polycarpa

Desert Saltbush

inconspicuous

S

3

6

Su

a

0

SD

February 2010

Yes

Yes

Yes

Page 1 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

15

SD

10

SD,CD

1

Bahia absinthifolia

Desert Daisy

Yellow

Spring to Fall

P

1

.5

Wi

1

Baileya multiradiata

Desert Marigold

Yellow

Spring through Fall

P

1

1

Wi

1

Buddleia marrubifolia

Wooly Butterfly Bush

Orange

Spring and
Summer

S

5

5

Su

15

CD

1

Calliandra eriophylla

Fairy Duster, False Mesquite

Pink

Spring

S

3

4

Su

10

SD

1

Carnegiea gigantea

Saguaro

White

Early Summer

C

50

25

Su

15

SD

1

Celtis pallida

Spiny or Desert Hackberry

Greenish-yellow

Spring

S

16

10

Su

17

SD,CD

1

Cereus hildmannianus
(C.peruvianus)

Peruvian Cereus, Hedge Cactus

White

Night blooming in
Summer

C

20

10

Su

25

S. Amer.

1

Condalia warnockii v. kearneyana

Condalia, Mexican Pincushion

White

Early Spring

S

6

5

Su

1015

SD,CD

1

Cylindropuntia bigelovii (Opuntia)

Teddy Bear Cholla

Green

Early Spring

C

6

3

Su

15

SD

1

Cylindropuntia versicolor (Opuntia)

Staghorn Cholla

Orange, Red, Yellow

Spring

C

10

6

Su

20

SD

1

Echinocactus grusonii

Golden Barrel

Yellow

Summer

C

3

2

Su

10

Mex.

1

Echinocereus spp.

Hedgehog, Rainbow Cactus

varies by species,
Red, Yellow, Pink,
Purple

Spring

C

2

2

Su

510

CD,SD

1

Echinopsis spp. & varieties

Easter Lily, Sea Urchin Cactus

Pink (various)

Spring to Summer

C

2

2

Su

20

S. Amer.

1

Encelia californica

California Brittlebush (green)

Yellow

Winter to Spring

S

4

4

Wi

c

15

So. Calif.

1

Encelia farinosa

Brittlebush

Yellow

Early Spring

S

3

3

Wi

c

15

SD

February 2010

Yes

a

Page 2 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC
Yes

1

Ephedra nevadensis

Ephedra, Morman Tea

Green inconspicuous

Spring

S

5

4

Su

1

Eremophila decipiens

Emu Bush

Dark red

Winter to Spring

S

5

5

Su

1

Erioneuron pulchellum

Fluffgrass

White

Summer and Fall

Gr

.5

.5

Su

1

Euphorbia antisyphilitica

Wax Plant, Candelilla

Creamy White - Red
centers

Spring and mid
Summer

S

3

3

1

Ferocactus spp.

Barrel Cactus

varies by speciesYellow, Red, Orange,
Purple

Varies Winter
through early Fall

C

5

1

Fouquieria columnaris

Boojum

White

Late Summer to
early Fall

T,A

1

Fouquieria macdougalii

Mexican Tree Ocotillo

Red

Spring

1

Fouquieria splendens

Ocotillo

Red

1

Geoffroea (Gourleia) decorticans

Chilean Palo Verde

1

Glandularia gooddingii (Verbena)

1

AL

INV

SCA

°F

ORIGIN

0

SD

17

Austr.

612

SD,CD

Su

17

CD

1.5

Su

020

SD,CD

75

1

Wi

25

Baja

S,A

6

4

Su

25

SD

Mid-Spring

A

15

8

Su

10

SD,CD

Yellow

Spring

T

20

15

Su

15

S. Amer.

Goodding Verbena

Lavender, Pink

Spring

P

1.5

3

Wi,
Sp

10

SD

Gutierrezia sarothrae

Snakeweed

Yellow

Early Fall

S,P

2

2

Su

-38

W. U.S.,
CAN, Mex.

1

Hyptis albida (emoryii)

Desert Lavender

Purple

Spring through Fall

S

8

8

Su

25

SD

1

Jatropha cardiophylla

Limberbush

inconspicuous White

Summer

S

3

4

Su

20

SD

1

Jatropha dioica

Jatropha

inconspicuous

Summer

S

3

3

Su

15

CD

1

Larrea tridentata (divaricata)

Creosote Bush, Greasewood

Yellow

Early Spring to Fall

S

8

8

Su

5

SD,CD

February 2010

a

Yes

Page 3 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

1

Lophocereus schotti

Senita

Pink

Spring to Summer

A, C

15

10

Su

0

SD

1

Lophocereus schotti, ssp.
Monstrosus

Totem Pole Cactus

Pink

Spring to Summer

A, C

10

8

Su

0

Baja

1

Lupinus arizonicus

Lupine

Purple

Winter to Spring

An

1

1

Wi

28

SD

1

Lupinus sparsiflorus

Desert Lupine

Purple

Late Winter to
Spring

An

1

1

Wi

28

SD

1

Lupinus succulentus

Arroyo Lupine

Deep Blue

Spring

An

2

1

Wi

25

SD

1

Lycium exsertum

Thornbush

White-Purple
followed by Red
berries

Spring

S

8

8

Su

10

SD

1

Lycium fremontii

Wolfberry, Tomatillo

White-Lavender
followed by Red
berries

Spring

S

10

8

Su

20

SD

1

Maireana sedifolia

Pearl Bluebush

Tan inconspicuous

S

2

3

25

Austr.

1

Mamillaria spp.

Pincushion, Fishhook Cactus

varies by species
Cream, Yellow, Red,
Pink

Varies by species
Spring to Summer

C

0.5

15

CD, SD

1

Muhlenbergia porteri

Bush muhly

Pink

Late Summer to
Fall

Gr

-25

SD,CD

1

Nolina beldingii

Belding's Nolina

White

1

Nolina bigelovii

Beargrass

Cream

1

Nolina lindheimeriana

Lindheimer's Nolina

White

1

Nolina matapensis

Tree Beargrass

White

1

Nolina microcarpa

Beargrass

Greenish White

February 2010

0.5

Su

2

3

Su

A

3

6

Wi

15

Baja

A

6

4

Su

0

SD

A

3-4

2-3

Su

-20

TX

Summer

A

25

6

Su

15

SD

Summer

A

3

6

Su

0

SD

Summer

a

Page 4 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

A

4-5

6-10

Su

0

Mex.

A

5

5

Su

10

SD

1

Nolina nelsoni

Blue Nolina

1

Nolina parryi

Parry's Beargrass

1

Nolina texana

Bear Grass

White

Late Spring

A

3

3

Su

0

TX, NM

1

Olneya tesota

Desert Ironwood, Tesota

Lavender-Pink

Late Spring to
early Summer

T

30

25

Su

15

SD,CD

1

Opuntia basilaris

Beavertail Prickly Pear

Hot Pink

Mid Spring

C

2

4

Su

15

SD

1

Opuntia engelmanii

Engelmann's Prickly Pear

Orange, Yellow

Spring

C

5

6

Su

10

SW. U.S.,
Mex.

1

Opuntia ficus-indica

Indian Fig

Yellow

Spring

C

1015

15

Su

15

Mex.

1

Opuntia macrocentra violacea

Black Spine Prickly Pear

Yellow, Red

Spring to early
Summer

C

2

3

Su

15

SD

1

Opuntia microdasys

Bunny Ears Prickly Pear

Yellow

Spring

C

3

6

Su

20

1

Opuntia santa rita 'Tubac'

Purple Pancake

Yellow

Spring

C

6

4

Su

10

AZ cultivar

1

Opuntia turpinii

Pinecone Prickly Pear

Pink

Summer

C

3

1

Su

15

W.
Argentina

1

Opuntia violacea 'Santa Rita'

Santa Rita Prickly Pear

Yellow

Spring

C

4

4

Su

10

AZ

1

Parkinsonia microphylla (Cercidium
microphyllum)

Littleleaf or Foothill Palo Verde

Yellow

Late Spring

T

20

20

Su

b

15

SD

1

Parkinsonia x sonorae (Cercidium)

Sonoran Palo Verde

Yellow

Spring

T

20

20

Su

b

25

SD

1

Pedilanthus macrocarpus

Slipper Flower, Lady's Slipper,
Candelilla

Red-Pink

Spring and Fall

A,Sc

3

3

Su

30

SD

February 2010

Green

PT

Yes

Page 5 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

20

SD

10

S. Africa

1

Peniocereus greggii

AZ Queen of the Night

White

Summer

C

6-7

3

Su

1

Pentzia incana

Karoo Bush

Yellow

Spring to Summer

Gc

1

3

Su

1

Plantago spp.

Indian Wheat

Cream, White

Spring

An

.252

0.5

Wi

1

Psilostrophe cooperi

Paper Flower

Yellow

Spring and
Summer

P

2

2

Wi

15

SD,CD

1

Psilostrophe tagetina

Paper Flower

Yellow

Spring and
Summer

P

2

2

Wi

10

SD,CD

1

Senna covesii (Cassia)

Desert Senna

Yellow

Late Spring to
early Fall

P

1

1

Su

15

SD

1

Senna purpussi (Cassia)

Baja Senna

Yellow

Winter to Spring

S

6

5

Wi

2530

Baja

1

Simmondsia chinensis & varieties

Jojoba, Goat Nut

Green inconspicuous

Spring

S

8

8

Wi

a

15

SD

1

Sporobolus airoides

Alkali Sacaton

White

Summer

Gr

5

3

Su

a

0

SD,CD

1

Sporobolus contractus

Spike Dropseed

White

Summer to Fall

Gr

3

1

Su

a

612

SD,CD

1

Stenocereus marginatus
(pachycereus)

Mexican Fence Post

Pink or Red outsidewhitish inside

Mid-Spring

A, C

12

1

Su

2530

Mex.

1

Stenocereus thurberi
(Lemaireocereus)

Organ Pipe Cactus

White, Purple

Summer

C

15

12

Su

2130

SD

1

Yucca baccata

Banana Yucca

White

Late Spring to
Summer

A

3

5

Su

5

SD,CD

1

Yucca brevifolia

Joshua Tree

White, Green

Late Winter to
early Spring

A

20

20

Wi

0

S. Calif,
S.W. Utah

1

Yucca treculeana

Spanish Dagger, Palma Pita

White

Spring

A

20

?

Su

0

CD, W. TX

February 2010

Yes

Yes

SD,CD

Page 6 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

1

Yucca whipplei

Our Lord's Candle

White & Purple

Once (EarlySpring)

A

3

6

Su

10

SD

1

Zinnia acerosa

Desert Zinnia

White-orange centers

Late Spring to Fall

P

1

1

Su

15

SD,CD

2

Abutilon palmeri

Indian Mallow

Apricot

Summer

S

3

4

Su

25

SD

2

Acacia aneura

Mulga

Yellow

Spring

T

18

18

Su

c

20

Austr.

2

Acacia angustissima

White Ball Acacia

White

Late Spring to
Late Summer

S

5

5

Su

c

-10

SD

2

Acacia cultriformis

Knife-Leaf Acacia

Yellow

Spring

T,S

15

15

Su

c

20

Austr.

2

Acacia notabilis

Notable Acacia

Yellow

Late Spring

S

8

15

Su

c

20

Austr.

2

Acacia redolens

Prostrate Acacia

Yellow

Spring

S,Gc

5

12

Su

c

20

Austr.

2

Acacia rigidula

Black Brush Acacia

Yellow

Spring

T,S

15

9

Su

c

20

CD

2

Acacia salicina

Willow Acacia

Creamy White

Spring

T

40

30

Su

c

20

Austr.

2

Acacia saligna

Weeping Wattle

Orange-Yellow

Early Spring

T

25

20

Su

c

15

Austr.

2

Acacia stenophylla

Pencilleaf Acacia

Creamy White

Early Spring

T

30

20

Su

c

18

Austr.

2

Acacia willardiana

Palo Blanco

Pale Yellow

Spring

T

20

10

Su

c

25

SD

2

Agave angustifolia v. marginata

Narrow leaf Agave

Greenish-Yellow

Once (Summer to
Fall)

A,Sc

3

4

Su

20

Mex.

2

Agave bovicornuta

Cow's Horn Agave

Yellow

Once (Spring to
Summer)

A,Sc

3

4

Su

19

Mex.

February 2010

Page 7 of 30

WU

BOTANICAL NAME

2

Agave bracteosa

2

Agave celsii

2

Agave chrysantha

2

COMMON NAME

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

White, orange

Once (Summer)

A,Sc

2

2

Su

10

Greenish with
purple/red tinge

Once

A,Sc

2

2

Su

15

E. Mex.

Golden Flower Agave

Yellow

Once (Summer)

A,Sc

3

4

Su

15

AZ

Agave colorata

Mescal Ceniza, Blue Century Plant

Yellow

Once (Spring to
early Summer)

A,Sc

3

3

Su

15

SD

2

Agave desmettiana & varieties

Smooth Agave

Pale Yellow

Once (Spring)

A,Sc

3

6

Su

25

Mex.

2

Agave fillifera

Agave

Green then reddish

Once (Summer)

A,Sc

2

3

Su

17

CD

2

Agave geminiflora-solitary

Twin-flowered Agave

Yellow tinged with red

Once (Fall to
Winter)

A,Sc

3

3

Su

20

Mex.

2

Agave havardiana

Havard Agave

Greenish Yellow

Once (Spring)

A,Sc

3

4

Su

-10

CD

2

Agave lophantha (univittata)

Holly Agave; Center Stripe Agave

Greenish Yellow

Once

A,Sc

3

6

Su

20

CD

2

Agave macroacantha

Black Spine Agave

Green

Once

A,Sc

2

2

Su

25

Mex.

2

Agave montana

Mountain Agave

Green, Creamy White

Once

A,Sc

4

6

Su

5

Mex.

2

Agave multifilifera

Chahuiqui

Light Green with Pink
Margins

Once

A,Sc

3

5

Su

15

CD

2

Agave murpheyi

Murphy Agave

Pale Green

Once (Fall)
produces bulbils
on flower stalk

A,Sc

3

3

Su

10

SD

2

Agave ocahui

Ocahui Agave

Yellow

Once (Spring to
Summer)

A,Sc

3

3

Su

10

SD

2

Agave ovatifolia

Whales Tongue Agave

Pale Green

Once

A,Sc

3

3

Su

20

Mex.

February 2010

Spider Agave

FLOWER COLOR

Page 8 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Agave palmeri

Palmer Agave

Pale Green

Once (Summer)
produces bulbils
on flower stalk

A,Sc

4

4

Su

10

SD

2

Agave parrasana

Parras Agave

Yellow

Once

A,Sc

2

2

Su

15

Mex.

2

Agave parryi & varieties

Agave

Yellow

Once (Summer)

A, Sc

2

2

Su

Yes

-20

CD

2

Agave parryi var. huachucensis

Huachuca Agave

Pink buds opening to
Yellow

Once (Late Spring
to early Summer)

A,Sc

2

3

Su

Yes

5

SD

2

Agave parviflora

Small Flowered Agave

Pale Yellow

Once (Summer)

A,Sc

.5

.7

Su

10

SD

2

Agave pelona

Mescal Pelon

Red

Once (Spring)

A, Sc

2

2.5

Wi

20

SD

2

Agave potatorum

Butterfly Agave

Pale Green

Once

A,Sc

1

2

Su

25

Oaxaca
Mex.

2

Agave salmiana ssp. Ferox

Pulque Agave, Salm's Agave

Yellow above Green
below

Once

A,Sc

4

6

Su

15

Central
Mex.

2

Agave scabra

Rough-leaved Agave

Yellow

Once (Late Spring
to Fall)

A,Sc

4

4

Su

15

CD

2

Agave schidigera

Agave

Dark Purple

Once (Fall to
Spring)

A,Sc

2

3

Su

15

Durango
Mex.

2

Agave shawii

Yellow

Once (Spring)

A,Sc

3

5

Su

20

Baja Cal.
Mex.

2

Agave striata

Yellow, sometimes
Red- Purple

Once (Summer)

A,Sc

3

3

Su

15

Mojave D

2

Agave utahensis

Yellow

Once

A,Sc

1

2

Su

-10

Mojave D

2

Agave victoriae-reginae & varieties

Queen Victoria Agave

Reddish Purple

Once (Summer)

A,Sc

1

2

Su

10

Mex.

2

Agave vilmoriniana

Octopus Agave

Yellow

Once (Spring)
produces bulbils
on flower stalk

A,Sc

4

6

Su

20

SD

February 2010

Needle-leaf Agave, Espidine

Yes

Page 9 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

2

Agave weberi

Weber Agave

Yellow

Once

2

Aloe ferox

Cape Aloe

Orange Red

2

Aloe variegata

Partridge Breast Aloe

2

Aloe x 'Blue Elf'

2

Aloysia gratissimma

2

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

A,Sc

4

6

Su

10

Mex.

Late Winter early
Spring

Sc

15

3

Su

25

Africa

Dark Pink to Red

Winter to Spring

Sc

1

1.5

Su

20

Africa

Orange-Red

Winter to Spring

A,Sc

2

1

Wi

15

garden
variety

Fragrant Bush, Bee Bush

White

Spring

S

6

8

Su

15

SD,CD

Aloysia wrightii

Wright's Bee Bush

White

Spring to Fall

S

4

4

Su

15

SD,CD

2

Anisacanthus quadrifidus & varieties

Flame Anisacanthus

Orange, Red

Summer to Fall

S

5

5

Su

5

CD

2

Anisacanthus thurberi

Desert Honeysuckle

Orange

Spring to Fall

S

6

4

Su

10

SD

2

Antigonon leptopus

Queen's Wreath

Pink, White, Red

Summer and Fall

V

20

20

Su

15

SD

2

Aristida purpurea

Purple Three-awn

Green, Green to Blue
foliage

Spring to early Fall

Gr

2

1

Su

0

SD,CD

2

Artemisia ludoviciana

Prairie Sagebrush, Wormwood

inconspicuous

July-Oct

S,Gc

1

3

Su

a

-40

SD

2

Atriplex lentiformis

Quail Bush

Greenish

Late Winter to
Spring

S

10

15

Su

a

15

SD

2

Atriplex lentiformis breweri

Brewer Saltbush

Light Yellow

Summer

S

10

10

Su

a

15

SD

2

Atriplex semibaccata

Australian Saltbush

inconspicuous

April through
September

S

1

6

Su

a

22

Austr.

2

Baccharis hybrid 'Starn'

Thompson Broom

inconspicuous Tan

Gc

4

5

Su

c

0

garden
cultivar

February 2010

Yes

Yes

Yes

Yes

Page 10 of 30

BLOOM SEASON

PT

W

GS

Cream, White

Fall

S

9

9

Su

Sweet Bush, Chuuckwalla's Delight

Yellow

Spring to Fall

S,P

4

4

Su

Berberis trifoliata

Algerita

Yellow

Spring

S

8

8

Su

2

Bothriochloa barbinodis

Cane Beardgrass, Cane Bluestem

Green

Late-Spring to
early-Fall

Gr

3

3

Su

2

Bougainvillea spp.

Bougainvillea

Purple, Red, Orange,
Pink

Late Spring to Fall

S,V

20

20

Su

2

Bouteloua spp.

Grama Grass

varies by species
Green, Pink, Orange,
Purple

Summer to Fall

Gr

.5 -3

1

Su

2

Brachychiton populneus

Bottle Tree

Pink

Late Spring

T

45

30

Su

2

Caesalpinia gilliesii (Poinciana)

Yellow Bird of Paradise

Yellow with Red
stamens

Late Spring to Fall

S

10

6

Su

Yes

Yes

2

Caesalpinia mexicana (Poinciana)

Mexican Bird of Paradise (yellow)

Yellow

Spring to Summer

S

15

10

Su

Yes

Yes

2

Callaeum macropterum (Mascagnia
macroptera)

Yellow Orchid Vine

Yellow

Spring and
Summer

V

25

25

Su

2

Calliandra californica

Baja Fairy Duster

Red

Spring through Fall

S

6

6

2

Calliandra peninsularis

Red Calliandra, Baja Fairy Duster

Red

Winter to Spring

S

6

2

Cassia artemisioides (Senna)

Wormwood Senna, Feathery
Cassia

Yellow

Late Winter to
Spring

S

2

Cassia nemophila (C.eremophila)

Green Cassia

Yellow

Winter to Spring

2

Cassia phyllodinea

Silvery Cassia

Yellow

Winter to Spring

WU

BOTANICAL NAME

2

Baccharis sarothroides and hybrids
(male varieties only)

Desert Broom

2

Bebbia juncea

2

February 2010

COMMON NAME

FLOWER COLOR

H

TOXIC

AL

INV

SCA

°F

ORIGIN

15

SD

15

SD,CD

15

SD

0

SD,CD

20

Brazil

-10

SD,CD

18

Austr.

Yes

10

S. Amer.

Yes

20

CD

22

SD,CD

Su

25

SD

6

Su

25

SD

5

5

Wi

20

Austr.

S

9

6

Wi

20

Austr.

S

6

6

Wi

20

Austr.

a

Yes

c

a

Yes

Yes

Yes

Page 11 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Casuarina cunninghamiana

Australian Pine

T

70

35

Su

b

20

Austr.

2

Casuarina stricta

Coast Beefwood

T

35

25

Su

b

15

Austr.

2

Cathestecum erectum

False Grama

Gr

.5

1

Su

c

7

SD

2

0.5

1.5

Wi

15

S. Africa

0

SW U.S.

20

SD,CD

18

SD

15

S. Eur.

Green

Summer

Cephalophyllum aestonii `Red Spike' Red Spike Ice Plant

Reddish-purple

Winter to Spring

Gc,Sc

2

Chrysactinia mexicana

Damianita Daisy

Yellow-Gold

Spring and Fall

S

2

2

Su

2

Cissus trifoliata v. incisa

Desert Grape Ivy

inconspicuous

Summer

V

20

20

Su

2

Condalia globosa

Bitter Condalia

White inconspicuous,
fragrant

Early Spring

T,S

15

20

Su

2

Convolvulus cneorum

Bush Morning Glory

White

Late Spring to Fall

S,Gc

2

3

Wi

2

Cordia boissieri

Anacahuita, Texas Olive

White

Spring to Fall

T,S

15

15

Su

22

CD

2

Cordia parvifolia

Littleleaf Cordia

White

Spring to Fall

S

8

10

Su

15

SD,CD

2

Dalea bicolor & varieties

Dalea Bicolor

Blue

Fall

S

6-8

5-6

Su

10

CD

2

Dalea greggii

Trailing Indigo Bush

Pink, Purple

Spring to Summer

2

Dalea pulchra

Indigo Bush

Pink, Purple

2

Dasylirion acrotriche

Green Desert Spoon

2

Dasylirion leiophyllum

Green Desert Spoon

February 2010

Yes

Yes

Yes

Gc

2

9

Su

15

CD

Winter, early
Spring

S

6

5

Su

0

SD

Cream on single
erect flower stalk

Summer to Fall

A

4

5

Su

15

CD

Greenish-yellowon
single erect flower
stalk

Spring

A

4

6

Su

-10

CD

Page 12 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Dasylirion quadrangulatum
(D.longissimum)

Toothless Desert Spoon

Greenish and White

Late Spring

A

4

5

Su

15

CD

2

Dasylirion texanum

Green Desert Spoon

Creamy White on
single erect flower
stalk

Late Spring to
early Fall

A

5

5

Su

0

CD

2

Dasylirion wheeleri

Sotol, Desert Spoon

Tan on erect stems

Mid to late Summer

A

4

5

Su

0

SD,CD

2

Datura wrightii

Sacred Datura, Jimson Weed,
Thorn Apple

White

Late- Spring to
early Fall

Gc

3

6

Su

2

Dicliptera resupinata

Native Dicliptera

Purple

Spring to Fall

P

2

3

Su

2

Digitaria californica

Arizona Cottontop

White

Summer to early
Fall

Gr

3

1.5

Su

2

Dodonaea viscosa & varieties

Hopbush

Green, inconspicuous

Spring to Fall

S

15

12

2

Ebenopsis ebano (Pithecellobium
flexicaule)

Texas Ebony

Cream White

Late Spring to Fall

T

30

2

Eremophila hybrid

Summertime Blue

Blue

Spring through
Summer

S

2

Eremophila laanii 'pink beauty'

Emu Bush

Pink

Spring

2

Eremophila maculata 'valentine'

Valentine Emu Bush

Red

2

Ericameria laricifolia & cultivars
(happloppapus larcifolius)

Turpentine Bush

2

Eriogeron divergens

Native Fleabane

2

2

Yes

Wg SD
zon
e
Yes

17

SD,CD

15

SD,CD

Su

20

SD,CD

20

Su

20

CD

6

6

Su,
Wi

25

Austr.

S

8

8

Su,
Wi

25

Austr.

Early to late Spring

S

5

6

20

Austr.

Yellow

Fall

S

2-3

-10

SD

White to Lavender

Spring to Summer

-20

SW U.S.

Eriogonum fasiculatum v. poliofolium Flattop Buckwheat

White to Pink

Summer

Eriogonum wrightii

White to Pink

Summer to early
Fall

February 2010

Wright Buckwheat

a

2-3

Su

1

2

Wi

S

1.5

2

Wi

15

S. CA,
AZ, UT

S

1.5

2

Wi

23

SD

Gc,An,
P

Yes

Page 13 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Eucalyptus campaspe

Silver Gimlet

inconspicuous

Late Winter to
Spring

T

35

25

Su

c

18

Austr.

2

Eucalyptus formanii

Eucalyptus

White

Summer

T

20

20

Su

c

15

Austr.

2

Eucalyptus leucoxylon (rosea)

White Iron Bark

White, Red

Fall to Winter

T

40

30

Su

c

18

Austr.

2

Eucalyptus microtheca

Tiny Capsule Eucalyptus, Coolibah

Creamy White
inconspicuous

Summer

T

35

35

Su

c

10

Austr.

2

Eucalyptus papuana

Ghost Gum

White inconspicuous

Summer

T

40

25

Su

c

22

Austr.

2

Eucalyptus polyanthemos

Silver Dollar Gum

Cream-white

Winter

T

40

30

Su

c

14

Austr.

2

Eucalyptus rudis

Desert Gum

T

100

50

Su

c

15

Austr.

2

Eucalyptus sargentii

Salt River Mallet

Yellow

T

40

30

Su

c

22

Austr.

2

Eucalyptus spathulata

Swamp Mallee

Cream and Gold

T

20

20

Su

c

17

Aust

2

Euphorbia myrsinites

Euphorbia

Gc

1

3

Wi

10

S.
Europe,
Cnt. Asia

2

Euphorbia rigida (biglandulosa)

Gopher Plant

Chartreuse

Winter to Spring

A,Sc

2

3

Wi

5

Africa

2

Eysenhardtia orthocarpa

Kidneywood

White

Summer

T

10

10

Su

15

CD, SD

2

Gaillardia aestivalis spp. winkleri

Winkler Gaillardia

P

2

3

Wi

0

TX

2

Gaillardia pinnatifida

Blanket Flower

Late Spring to
early Fall

P

2

2

Wi

-30

SW U.S.

2

Gossypium harknessii

Gossypium, Wild Cotton

Spring and Fall

S

3

3

Su

25

SD

February 2010

Yellow

Summer

Yes

Yes

Page 14 of 30

H

W

GS

°F

ORIGIN

T

30

30

Su

20

SD

Late Spring to
Mid-Summer

T

30

12

Su

22

CD

Pink

Summer

A

3

3

Su

10

NM

Giant Hesperaloe

Creamy White

Summer

A

5

5

Su

5

CD

Hesperaloe nocturna

Night Flowering Hesperaloe

White and Green

Spring to Fall

A

3

3

Su

10

SD

2

Hesperaloe parviflora & varieties

Red Yucca, Yellow Yucca

Pink, Red, Yellow

Spring and
Summer

A

3

4

Su

0

CD

2

Hibiscus coulteri

Yellow Hibiscus, Coulter's Hibiscus

Pale Yellow

late Spring to Fall

S

3

3

Su

10

SD,CD

2

Hilaria berlangeri

Curly mesquite

Green

late Summer to
Fall

Gr

.5

1

Su

b

0

SD,CD

2

Hilaria mutica

Tobosa grass

Green

Summer to Fall

Gr

2

2

Su

b

2

SD,CD

2

Hilaria rigida

Big galleta grass

Green

Spring through
Fall

Gr

3

1

Su

b

10

SD,CD

2

Justicia californica and cultivars
(Beloperone)

Chuparosa

Red

Spring

S

3

4

Su

20

SD

2

Justicia candicans

Red Jacobinia

Red, orange

Fall to Spring

S

5

3

Su

25

SD

2

Leucaena retusa

Golden Leadball

Yellow

Spring to Summer

T

20

15

Su

10

CD

2

Leucophyllum spp. & varieties

Texas Ranger

varies by species
Pink, Purple,
Lavender, White

Summer humidity

S

3-10 3-10

Su

510

CD

2

Lotus rigidus

Desert Deerweed, Deer Vetch

Yellow and Orange

Spring

1.5

Wi

5

SD

BLOOM SEASON

BOTANICAL NAME

2

Havardia mexicana (Pithecellobium
mexicanum)

Mexican Ebony

Creamy Yellow

Spring

2

Havardia pallens (Pithecellobium
pallens)

Tenaza

White

2

Hesperaloe campanulata

Bell Flowering Hesperaloe

2

Hesperaloe funifera

2

February 2010

COMMON NAME

FLOWER COLOR

WU

PT

Gc,P

2

TOXIC

AL

c

INV

SCA

Page 15 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

6

TOXIC

AL

INV

SCA

°F

ORIGIN

Su

20

SD

10

SD,
Mojave D

20

U.S.

2

Lycium andersonii

Desert Wolfberry

Lavender, followed
by Red berries

Spring

S

6

2

Lycium pallidum

Desert Thorn

White, followed by
Red berries

Spring

S

3-9

4-6

Su

2

Macfadyena unguis-cati

Cat's Claw Vine

Yellow

Spring

V

30

30

Su

2

Malephora crocea

Croceum, Ice Plant

Copper to red

Late Fall to late
Winter

Gc,Sc

1

6

Su

20

S. Africa

2

Mascagnia lilacina

Purple Orchid Vine

Purple

Spring and
Summer

V

15

10

Su

1015

CD

2

Maytenus phyllanthoides

Mangle Dulce

Green inconspicuous

S

12

12

Su

15

SD,CD

2

Melampodium leucanthum

Blackfoot Daisy

White

Early Spring to Fall

Gc

2

2

Su

15

SD,CD

2

Merremia aurea

Yellow Morning Glory Vine

Yellow

Summer to Fall

V

25

25

Su

15

SD

2

Mimosa dysocarpa

Velvetpod

Pink, White

Summer

S

6

6

Su

c

15

SD

2

Muhlenbergia emersleyi

Bullgrass

Purple dries to tan

Fall

Gr

4

4

Su

a

0

SD

2

Muhlenbergia rigens

Deer grass

Tan

Summer to Fall

Gr

4

4

Su

a

10

SD

2

Nassella tenuissima

Mexican Feather Grass

Tan

Fall

Gr

3

1

Su

b

0

CD

2

Nerium oleander & varieties

Oleander

Pink, White, Red,
Salmon

Mid-Spring to Fall

S

4-20 5-12

Su

20

Asia

2

Oenothera berlandieri (speciosa)

Mexican Evening Primrose

Pink

Spring to Fall

Gc, P

1

3

Su,
Wi

25

CD, TX,
Mex.

2

Oenothera caespitosa

White Evening Primrose, Tufted
Evening Primrose

White

Spring

Gc, P

1

3

Wi,
Sp

5

W. U.S.

February 2010

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Page 16 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

2

Oenothera stubbei

Chihuahuan Primrose

Yellow

Summer to Fall

2

Olea europaea 'Swan Hill', 'Wilsoni'

Fruitless non-polinating Olive

White

2

Pappophorum mucronulatum

Pappusgrass

2

Parkinsonia praecox (Cericidium)

2

Parkinsonia florida (Cercidium
floridum)

2

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

Gc, P

1

2

Su,
Wi

17

SD, NE
Mex.

Spring

T

30

30

Su

15

Medit.

White

Spring to early Fall

Gr

3

2

Su

a

1218

SD

Palo Brea

Yellow

Spring

T

30

25

Su

b

25

SD

Blue Palo Verde

Yellow

Early Spring

T

30

30

Su

b

12

SD

Parkinsonia hybrid "Desert Museum" Desert Museum Palo Verde

Yellow

Spring to Summer

T

30

30

Su

b

17

SD,CD

2

Passiflora foetida

Passion Flower

White, Purple

Summer

V

10

10

Su

25
RH

SD

2

Pennisetum setaceum `Cupreum'

Purple Fountain Grass

Pink, Purple

Summer

Gr

4

5

Su

15

Africa

2

Penstemon ambiguus

Pink Plains Penstemon

Pink

Summer

P

3

3

Su

10

W. U.S.

2

Phacelia campanularia

Desert Bluebells, Desert
Canterbury Bells

Blue

Early Spring

An

1

1

Wi

10

SD

2

Phacelia tanacetifolia

Tansy Phacelia

Blue, Purple

Early Spring

An

1

1

Wi

10

N. Calif.,
N. Baja

2

Phoenix canariensis

Canary Island Date Palm

Cream, White

Summer

T

60

30

Su

c

20

Canary
Islands

2

Phoenix dactylifera

Date Palm

insignificant

Summer

T

100

20

Su

c

18

Asia

2

Pinus edulis

Piñon Nut Pine

insignificant

T

25

15

Su

c

-31

NM, Calif,
AZ

2

Pinus eldarica

Afghan Pine

insignificant

T

50

25

Su

c

1015

Asia

February 2010

Yes

Yes

b

Yes

Yes

Page 17 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Pinus halepensis

Aleppo Pine

insignificant

T

80

60

Su

c

13

Medit.

2

Pinus monophylla

Singleleaf Piñon Pine

insignificant

T

25

15

Su

c

-31

Mojave D,
N. AZ

2

Pinus pinea

Italian Stone Pine

insignificant

T

60

50

Su

c

15

Medit.

2

Pistacia atlantica

Mt. Atlas Pistache

insignificant greenish
white

T

60

50

Su

c

20

Medit.

2

Pistacia vera

Pistachio

T

30

30

Su

c

0

Asia

2

Pittosporum phillyraeoides

Willow Pittosporum

Yellow

Spring

T

20

15

Su

15

Austr.

2

Prosopis hybrid

South American Mesquite

Light Yellow

Spring

T

40

40

Su

b

15

S. Amer.

2

Prosopis glandulosa & varieties

Texas Honey Mesquite

Creamy Yellow

Spring

T

30

30

Su

b

10

CD

2

Prosopis pubescens

Screwbean Mesquite

Yellow

Spring

T

20

20

Su

b

0

SD,CD

2

Prosopis velutina (juliflora)

Velvet Mesquite

Yellow

Spring

T

30

30

Su

b

0

SD

2

Quercus turbinella

Shrub Live Oak

Green inconspicuous

S

10

10

Su

b

5

W. U.S.

2

Rhus microphylla

Littleleaf Sumac

White, Red Fall Color

Spring before
leaves

S

10

10

Su

Yes

c

20

CD, SD

2

Rhus ovata

Sugar Bush, Sugar Sumac

Pink & White
followed by small red
fruit

Spring

S

15

15

Wi

Yes

c

15

Calif., AZ

2

Rhus trilobata & varieties

Three Leaf Sumac, Skunk, Bush

inconspicuous, small
red fruit, Fall color

Spring

S

5

8-10

Su

c

-40

Can.,U.S.,
Mex.

2

Rhus virens

Evergreen Sumac

White followed by
showy berries

Spring

S

12

12

Su

c

15

CD, SD

February 2010

Early Summer

Yes

Page 18 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

2

Rosmarinus officinalis & varieties

Rosemary

Blue

Spring and Fall

S

3

8

Su

15

Medit.

2

Ruellia californica

Sonoran Desert Ruellia

Blue, Purple

Late Spring to Fall

S

4

4

Su

28

SD

2

Ruellia peninsularis

Baja Ruellia

Blue, purple

Spring to Summer

S

4

4

Su

25

SD

2

Ruschia uncinatus

Ruschia

Pink

Summer

1.5

Su

25

S. Africa

2

Salvia chamaedryoides

Blue Chihuahuan Sage

Cobalt blue

Spring and Fall

S

2

2

Su

15

CD

2

Salvia clevelandii

Cleveland Sage

Blue

Late Spring to
Summer

S

5

5

Wi

15

S. CA,
Baja

2

Salvia dorri v. dorrii

Mojave Sage

Blue-violet

Late Winter and
Spring

S

2

2

Wi

-25

MD

2

Salvia hybrid (S.dorrii x S.clevlandii
x S.mojavensis)

Trident, Carl Nielson Sage

Cobalt Blue

Spring

S

3

3

Wi

2030

SD hybrid

2

Salvia mohavensis

Mohave Sage

Lavender

Spring to midSummer

S

3

3

Wi

5

2

Santolina chamaecyparissus

Lavender Cotton

Yellow/ silvery foliage

Spring

S,Gc

2

3

Wi

-10

Medit.

2

Sapindus sapnaria drummondii

Soapberry

Creamy White

Late Spring

T

30

30

Su

Yes

5

SD,CD

2

Senecio cineraria

Dusty Miller, Silver Plant

Yellow/silvery foliage

Spring

P

2

2

Wi

Yes

15

Medit.

2

Senna lindheimeriana (Cassia)

Senna

Yellow

Summer to Fall

S

3

2

Wi

0

CD

2

Senna wislizenii (Cassia)

Cassia, Shrubby Senna

Yellow

Summer

S

8

8

Su

10

SD,CD

2

Sesuvium verrucosum

Sea Purslane, Ice Plant

Pink

Early Spring to Fall

0.5

3

Su

5

Africa

February 2010

Gc,Sc

Gc

1.5

SD, MD

Page 19 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

T,S

25

15

Su

Yes

2

Sophora secundiflora & varieties

Texas Mountain Laurel

Purple to Lavender

Spring

2

Sphaeralcea ambigua & varieties

Globe Mallow

Orange, White, Red,
Purple, Lavender

Early Spring and
Fall

P

3

3

Wi

2

Sporobolus flexuosus

Mesa Dropseed

White

Summer to early
Fall

Gr

3

1

Su

2

Tecoma stans v. angustata

AZ Yellow Bells

Yellow

Late Spring to Fall

S

10

8

2

Tetraneuris acaulis (Hymenoxys)

Angelita Daisy

Yellow

All Year, heaviest
in Spring

P

1

2

Teucrium chamaedrys (prostratum)

Prostrate Germander

Lavender

Spring and
Summer

Gc

2

Teucrium fruticans

Bush Germander

Blue or Lavender

Spring to Fall

S

2

Thymophylla pentachaeta
(Dyssodia)

Golden Dyssodia, Golden Fleece

Yellow

Late Spring to Fall

Gc

2

Thymophylla acerosa (Dyssodia)

Scrubby Dogweed

Yellow

Late Spring to
early Fall

2

Trichloris crinita

Two-feather Trichloris

White dries to Tan reddish highlights

2

Trichocereus & varieties

Trichocereus Cactus

2

Tridens muticus

2

AL

INV

SCA

°F

ORIGIN

5

CD

15

SD

612

SD,CD

Su

5

SD,CD

1

Su

10

SW U.S.

1

2

Su

-20

Medit.

8

8

Su

10

Medit.

0.5

0.5

Su,
Wi

10

SD,CD

Gc

.5

.5

Su

10

SD,CD

Late Spring to Fall

Gr

3

1

Su

1218

SD,CD

White, Yellow,
Oragne, Red

Varies by variety
Spring, Summer,
Fall

C

1-15

1-5

Su

10

S. Amer.,
Argentina

Slim Tridens

White

Spring to Fall

Gr

1.5

0.5

Su

25

SD,CD

Trixis californica

Trixis

Yellow

Spring

S

3.5

3.5

Su

15

CA to TX

2

Vauquelinia californica & varieties

Arizona Rosewood

White

Spring to Summer

T,S

25

15

Su

10

SD

2

Vauquelinia corymbosa & varieties

Mexican Rosewood

White inconspicuous

Spring

S

15

20

Su

-10

TX, Mex.

February 2010

a

Yes

a

b

Page 20 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

2

Verbesina encelioides

Crown Beard

Yellow

Spring

An

3

3

Wi

2

Viguiera parishii (V deltoidea)

Goldeneye

Yellow

Spring, Late
Summer

P

3

3

Wi,
Su

0

SD

2

Vitex agnus-castus

Chaste Tree, Monk's Pepper

Blue

Summer to Fall

T,S

25

25

Su

5

Medit.

2

Washingtonia filifera

California Fan Palm

Cream

Summer

T

45

15

Su

c

Yes

20

SD

2

Washingtonia robusta

Mexican Fan Palm

Cream

Summer

T

75

10

Su

c

Yes

15

SD

2

Yucca aloifolia

Spanish Bayonet Yucca

White

Spring to Summer

A

10

5

Su

15

SD

2

Yucca baileyi

White

Summer

A

4

2

Su

15

CO, UT

2

Yucca constricta

Buckley Yucca

White

Spring through
Summer

A

5

5

Su

0

TX

2

Yucca elata

Soaptree Yucca

White

Late Spring to
Summer

A

20

8

Su

0

SD,CD

2

Yucca faxoniana (carnerosana)

Giant Dagger Yucca

White

Summer

A

15

4

Su

10

CD

2

Yucca filifera (australis)

St. Peter's Palm

White

A

2.5

4

Su

10

Mex.

2

Yucca glauca

Soapweed Yucca

White

Summer

A

3

3

Su

25

U.S.

2

Yucca harrimaniae

Harriman's Yucca

White

Mid-Summer

A

6-22

18

Su

-20

SW U.S.

2

Yucca pallida

Paleleaf yucca

White

Late Spring

A

2

2

Su

-10

TX

2

Yucca rigida

Mexican Blue Dagger Yucca

White

Summer

A

12

5

Su

10

CD

February 2010

Yes

ORIGIN

SD,CD

Page 21 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

9

Su

0

CD

4-6

Su

10

W. U.S,
Mex.
SD

2

Yucca rostrata

Beaked Yucca

White

Summer

A

12

2

Yucca schidigera

Mojave Yucca

White

Spring

A

9-15

2

Yucca schottii

Mountain Yucca

White

Early Summer

A

15

4

Su

0

2

Yucca thompsoniana

Thompson Yucca

White

Early Summer

A

10

5

Su

-20

2

Yucca torreyi

Torrey's Yucca

White

Spring

A

8-15

6

Su

0

TX, NM,
No. Mex.

2

Zinnia grandiflora

Prairie Zinnia

Yellow, Orange

Summer to Fall

P

1

1

Su

10

SE. AZ,
NM

2

Zizyphus jujuba

Chinese Date, Common Jujube

Yellow-white

Spring

T

40

30

Su

20

Asia

3

Acacia berlandieri

Guajillo

White

Summer

T,S

15

15

Su

c

20

CD

3

Acacia farnesiana (smalli)

Southwestern Sweet Acacia

Yellow

Spring

T,S

25

25

Su

c

12

SD,CD

3

Acacia schaffneri

Twisted Acacia

Yellow

Spring

T

20

25

Su

c

17

CD

3

Achnatherum hymenoides
(Oryzopsis hymenoides)

Indian Ricegrass

Green

Spring

Gr

2

2

Su

a

10

SD,CD

3

Amsonia grandiflora

Large-flowered Blue Star

White tinged with
Lavender

Spring to early
Summer

S,P

3

3

Su

-10

SD

3

Asclepias linaria

Pine Leaf Milkweed

White

Spring to Fall

S

3

3

Su

20

SD,CD

3

Bauhinia lunaroides

Pink or White Orchid Tree

Pink, White

Spring to early
Summer

S

12

10

Su

5

CD

3

Berberis harrisoniana

Barberry

Yellow

Late-Winter to
early-Spring

S

3

3

Su

15

SD

February 2010

Yes

Yes

Yes

Yes

SW TX

Page 22 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

Yes

0

SE. AZ

3

Berlandiera lyrata

Chocolate Flower

Yellow with Maroon
center

Spring to Fall

P

2

2

Su

3

Brahea (Erythea) armata

Mexican Blue Palm

White

Spring

T

30

10

Su

c

15

SD

3

Buchloe dactyloides

Buffalo Grass

Tan

Summer to Fall

Gr

.5

.5

Su

a

-30

CD

3

Bulbine frutescens and cultivars

Shrubby Bulbine

Yellow to Orange

Fall to Spring

Sc

2

2

Wi

20

S. Africa

3

Caesalpinia cacalaco

Cascalote

Yellow

Winter

S

15

18

Su

Yes

20

Mex.

3

Caesalpinia pulcherrima

Red Bird of Paradise

Red, Orange

Summer

S

6-8

6

Su

Yes

28
RH

Caribb.

3

Callistemon citrinus

Lemon Bottlebrush

Red

Off and on all year

T,S

15

10

Su

10

Austr.

3

Calylophus hartwegii & varieties

Calylophus, Yellow Evening
Primrose

Yellow

Spring to Summer

Gc

1.5

3

Su,
Wi

0

CD, SD

3

Campsis radicans

Common Trumpet Creeper

Orange, Red

Summer to Fall

V

20

20

Su

15

SE U.S.

3

Carpobrotus edulis
(Mesembryanthemum edulis)

Ice Plant

Pale Yellow to
Pinkish Purple

Summer

Gc,Sc

1

6

Wi

20

Africa

3

Celtis reticulata

Netleaf or Western Hackberry

Greenish

March through
Summer

T

30

30

Su

-20

SD,CD

3

Centaurea cineraria

Dusty Miller

Purple, Yellow

Summer

P

3

3

Wi

15

Medit.

3

Ceratonia siliqua

Carob, St. John's Bread Tree

Pink

Spring

T

40

40

Su

22

Medit.

3

Cercis canadensis v. mexicana

Mexican Redbud

Magenta

Early Spring

T,S

15

15

Su

10

CD

3

Chamaerops humilis

Mediterranean Fan Palm

insignificant

n/a

T

15

10

Su

12

Spain

February 2010

c

Yes

a

c

Yes

Page 23 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

Yes

Yes

0

SD,CD

15

Africa

3

Chilopsis linearis and cultivars

Desert Willow

White, Lavender,
Pink, Purple

Late-Spring to Fall

T,S

30

30

Su

3

Convolvulus mauritanicus

Ground Morning Glory

Sky Blue

Spring and
Summer

Gc

.5

2

Wi

3

Cupressus arizonica & varieties

Rough-barked Arizona Cypress

inconspicuous

n/a

T

50

20

Su

a

10

SD,CD

3

Cupressus glabra

Smooth Bark Cypress

n/a

n/a

T

40

20

Su

a

10

SD

3

Dalbergia sissoo

Rosewood

inconspicuous greenyellow

T

50

30

Su

10

India

3

Dalea capitata

Yellow Dalea

Yellow

Spring and Fall

Gc

1

3

Su

15

Mex.

3

Dalea frutescens

Black Dalea

Pink, Rose to Purple

Late Fall

S

4

5

Su

15

CD

3

Dalea versicolor v. sessilis

Indigo Bush, Dalea

Purple

Fall to early Spring

S

4

5

Su

0

SD

3

Dimorphotheca sinuata

African Daisy, Cape Marigold

Orange, White,
Yellow

Winter to Spring

An

0.5

0.5

Wi

-40

S. Africa

3

Eragrostis intermedia

Plains Lovegrass

Light Pink, White

Summer to Fall

Gr

3

1

Su

-23

SD,CD

3

Eschscholtzia californica

California Poppy

Orange, Pale -yellow,
occasionally White

Late-Spring

An

2

2

Wi

20

SD

3

Eschscholtzia mexicana

Mexican Gold Poppy

Orange, pale-yellow,
occasionally White

Early-Spring

An

1

1

Wi

30

SD

3

Eucalyptus camaldulensis

Red River Gum

Yellow inconspicuous

Winter to Spring

T

120

50

Su

20

Austr.

3

Eysenhardtia texana

Texas Kidneywood

White

Spring to Summer

T

8

8

Su

15

CD

3

Feijoa sellowiana

Pineapple Guava

White with red
stamens

Spring

T,S

15

15

Su

15

S. Amer.

February 2010

a

c

Page 24 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

T,S

18

15

Su

TOXIC

AL

INV

SCA

ORIGIN

15

CD

3

Fraxinus greggii

Littleleaf Ash

inconspicuous Green

3

Gaillardia pulchella

Fire Wheel, Blanket Flower

Deep Maroon center
with Yellow outside
edges

Late Spring to
early Fall

An

1.5

1.5

Wi

15

CD

3

Gazania rigens & varieties

Gazania

Orange, Yellow,
White

Winter to Spring,
Fall

Gc

.5

2

Wi

20

Africa

3

Geijera parviflora

Australian Willow

White

Spring

T

25

20

Su

18

Austr.

3

Glandularia peruviana (Verbena
peruviana)

Peruvian Verbena

Pink, Blue, Purple

Spring to Fall

P

0.2

3

Su

15

S. Amer.

3

Glandularia pulchella (V.tenuisecta)
(V. tenera)

Moss Verbena, Rock Verbena

Purple

Spring to Fall

P

1

5

Su,
Wi

Yes

20

S. Amer.

3

Glandularia rigida(Verbena rigida)

Sandpaper Verbena

Purple

Summer to Fall

Gc,P

2

4

Su

Yes

15

S. Amer.

3

Glandularia tenuisecta 'Edith'
(Verbena tenuisecta 'Edith')

Moss Verbena

Lavender, Purple

Spring

Gc P

1-2

4-5

Su,
Wi

Yes

15

S. Amer.

3

Guaiacum coulteri

Guayacan

Blue-Purple

Spring through
Summer

T,S

12

10

Su

25

SD

3

Hamelia patens

Texas Firecracker Bush

Red, Orange

Summer

S

10

5

Su

10

FL, Caribn.

3

Heteropogon contortus

Tanglehead

Brown

Summer and Fall

Gr

3

2

Su

c

15

SD

3

Juniperus chinensis and culitvars

Juniper

n/a

T

20

10

Su

b

-30

Asia

3

Juniperus deppeana

Alligator Bark Juniper

inconspicuous

T

40

30

Su

a

0

3

Juniperus sabina

Sabine Juniper

inconspicuous

S

1.5

8

Su

b

-30

AZ

3

Justicia fulvicoma

Mexican Plume

Reddish Orange

S

2

3

Su

20

Mex.

February 2010

Spring and Fall

a

°F

Yes

Yes

SD,CD

Page 25 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

3

Justicia spicigera

Firecracker Bush

Orange

Summer to Winter

S

4

4

Su

3

Lantana camara and cultivars

Bush Lantana

Orange,Yellow, Red,
Pink

Spring to Fall

S

3

4

Su

3

Lantana montevidensis

Trailing Lantana

Lavender

Spring to Summer

Gc

1.5

6

Su

3

Leptochloa dubia

Green Sprangle-Top

Green

Summer

Gr

3

1

Su

3

Linum grandiflorum `Rubrum'

Scarlet Flax

Scarlet

Spring

An

2

1

Wi

3

Linum lewisii

Blue Flax

Bright Blue

Spring

An

2

1

Wi

3

Lysiloma watsonii var. thornberi

Feather Tree

White

Late Spring

T,S

20

20

Su

3

Malephora lutea

Rocky Point Ice Plant

Yellow

Nearly all year

Gc, P

8

4

3

Mirabilis multifora

Desert Four O'clock

Hot Pink

Summer to early
Fall

Gc,P,
V

3

3

Muhlenbergia capillaris

Regal Mist

Pink

Fall

Gr

3

Muhlenbergia dumosa

Bamboo Muhly

Green dries to tan

Spring to Summer

3

Muhlenbergia lindheimeri

Autumn Glow

Yellow dries to tan

3

Muhlenbergia rigida

Purple Muhlenbergia

3

Myoporum parvifolium

3

Myrtus communis & varieties

February 2010

TOXIC

AL

INV

Yes

SCA

Yes

a

°F

ORIGIN

24

Mex.

1020

U.S.,
Tropics

25

S. Amer.

5

CD,SD

N. Africa

-30

SD,CD

25

SD

Su

15

S. Africa

4

Su

25

U.S.

3

3

Su

-20

U.S.

Gr

6

6

Su

a

20

SD

Fall

Gr

5

5

Su

a

-10

TX

Purple dries to tan

Late Summer to
Fall

Gr

5

3

Su

a

0

SD

Purple Myoporum

White

Spring to Summer

Gc

0.5

9

Su

25

Austr.

True Myrtle, Roman Myrtle

White

Spring

6

5

Su

20

Medit.

S

Yes

Yes

Page 26 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

3

Nandina domestica & varieties

Heavenly Bamboo

White followed by
Red berries

Spring

3

Osteospermum fruticosum

Trailing African Daisy

White, Purple

Winter to Spring

3

Penstemon amphorellae

Blue

3

Penstemon baccharifolius

Cutleaf Penstemon

3

Penstemon barbatus

3

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

15

Asia

20

Africa

S

6

4

Su

Gc

1

4

Wi

Late Spring

P

1

2

Su

0

Central
Mex.

Red-Rose

Summer

P

2

3

Su

10

CD

Beardtongue Penstemon

Red

Summer to early
Fall

P

1

1

Wi

5

SD,CD

Penstemon cardinalis

Cardinal Penstemon

Red

Spring, Summer

P

1

1-2

Wi

5

TX

3

Penstemon cobaea

Foxglove Penstemon

White-lavender

Spring

P

1

1

Wi

-25

TX?

3

Penstemon eatoni

Firecracker Penstemon

Red

Late Winter to
Early Spring

P

1

1

Wi

-30

SD

3

Penstemon fendleri

Fendler Penstemon

Violet

Spring through
Summer

P

1

1

Wi

5

3

Penstemon grandiflorus

Large Fendler Penstemon

Lavender

Early Summer

P

1

1

Wi

-40

3

Penstemon palmeri

Palmer Penstemon

White, Pink

Spring through
Summer

P

2

2

Wi

5

SW U.S.

3

Penstemon parryi

Parry Penstemon

Pink, Red

Early Spring

P

1

1

Wi

15

SD

3

Penstemon pinifolius

Pineleaf Penstemon

Red, Orange

Summer

P

1

2

Su

-40

No. AZ,
UT

3

Penstemon pseudospectabilis

Canyon Penstemon, Mohave
Beardtongue

Rose-purple

Spring to midSummer

P

1

1

Wi

5

SD

3

Penstemon spectabilis

Mojave Penstemon, Royal
Penstemon

Blue-purple

Spring to midSummer

P

1

1

Wi

15

CA, N.
Baja Mex.

February 2010

c

Yes

Yes

OK, AZ,
NM
TX

Page 27 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

-30

W. U.S.

3

Penstemon strictus

Rocky Mountain Penstemon

Blue

Early Summer

P

1

1

Su

3

Penstemon subulatus

Little Beardtongue

Red

Spring

P

1

1

Wi

3

Penstemon superbus

Superb Penstemon, Santa Rita
Penstemon

Coral-red

Spring

P

2

2

Wi

-30

CD, SD,
N.M.

3

Penstemon triflorus

Hill Country Penstemon

Rose

Early Spring

P

1

1

Wi

10

TX

3

Penstemon wrightii

Texas Rose, Wright's Penstemon

Orange- Pink

Spring to Summer

P

1

1

Wi

10

TX

3

Phyla nodiflora

Lippia

White

Summer

.125

0.5

Su

15

Trop.
America

3

Pinus roxburghii

Chir Pine

insignificant

T

80

40

Su

c

20

Asia

3

Pistacia atlantica x integerrima

Pistache hybrid tereb. x integerrima

T

30

30

Su

c

0

Medit. x
Asia

3

Pistacia chinensis

Chinese Pistache

Green (Red leaves)
Fall color

T

60

50

Su

c

10

Asia

3

Pittosporum tobira & cultivars

Mock Orange

White

S

6

10

Su

29

Asia

3

Poliomintha maderensis

Lavendar Spice

Lavender

Spring through
Summer

S

2

2

Su

20

CD

3

Portulacaria afra

Elephant Food

Pink inconspicuous

rarely blooms in
U.S.

Sc

12

12

Su,
Wi

25

S. Africa

3

Punica granatum & varieties

Pomegranate

Dark Orange, Red

Summer

T,S

20

15

Su

10

India

3

Pyracantha & varieties

Pyracantha (red berried types)

White followed by
Red berries

Spring

S

20

12

Su

010

Asia

3

Quercus arizonica

Arizona White Oak

Green inconspicuous

T

60

30

Su

5

SD,CD

February 2010

Gc

SD

b

Page 28 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

TOXIC

AL

INV

SCA

°F

ORIGIN

3

Quercus buckleyi (Q texana)

Texas Red Oak

Green
inconspicuous; Red
Fall Color

T

30

30

Su

b

5

W. TX

3

Quercus emoryi

Emory Oak

Green inconspicuous

T

50

40

Su

b

5

SD,CD

3

Quercus fusiformis

Escarpment Live Oak

Green inconspicuous

T

50

50

Su

b

-10

W. TX

3

Quercus gambelii

Gambel Oak

Green inconspicuous

T,S

30

15

Su

b

-30

SW U.S.

3

Quercus ilex

Holly Oak

Green inconspicuous

T

50

50

Su

b

5

Medit.

3

Quercus muhlenbergia

Chinquapin Oak

Green
inconspicuous,
Orange and Bronze

T

30

30

Su

b

-20

W. TX

3

Quercus polymorpha

Monterey Oak

Green inconspicuous

T

80

60

Su

b

0

W. TX

3

Quercus suber

Cork Oak

Green inconspicuous

T

60

40

Su

b

5

Medit.

3

Quercus virginiana

Live Oak

Green inconspicuous

T

50

50

Su

b

15

SE U.S.

3

Rosa banksiae

Lady Banks Rose, Tombstone
Rose

White, Yellow

Spring

S,Gc,
V

20

20

Su

10

China

3

Ruellia brittoniana & varieties

Dwarf Ruellia

Blue, White

Throughout warm
season

Gc

6

12

Su

15

Mex.

3

Salvia columbariae

Chia

Blue

Spring

An

.5

.25

Wi

32

SD

3

Salvia farinacea

Mealy Cup Sage, Texas Violet

Violet, Blue, White

Spring to early Fall

S

1

1

Su

-10

CD

3

Salvia greggii

Red Chihuahan Sage, Autumn
Sage

Red, Hot Pink,
Purple, White

Spring to Summer

S

3

3

Su

5

CD

3

Salvia leucantha

Purple Mexican Bush Sage

Purple

Spring to Fall

S

4

4

Su

25

Mex.

February 2010

Page 29 of 30

WU

BOTANICAL NAME

COMMON NAME

FLOWER COLOR

BLOOM SEASON

PT

H

W

GS

T

30

20

S,Gc

2

TOXIC

AL

INV

SCA

°F

ORIGIN

Wi

25

SD,CD

2

Wi

-20

Medit.

30

Mex.

3

Sambucus nigra spp. Cerulea
(S.mexicana)

Mexican Elderberry

Creamy White

Winter and Spring

3

Santolina virens

Green Santolina

Creamy Yellow

Spring

3

Sapindus sapnaria saponaria

Soapberry

Creamy White

Late Spring

T

30

30

Su

3

Schinus molle

California Pepper Tree

Yellow-white
(insignificant)

Summer

T

40

45

Su

b

25

S. Amer.

3

Sporobolus cryptandrus

Sand Dropseed

White

Gr

2

1

Su

a

612

SD,CD

3

Sporobolus wrightii

Big Sacaton

Green

Late Summer to
Fall

Gr

5

4

Su

a

-30

SD,CD

3

Tagetes lemmoni

Mountain Marigold

Orange, Yellow

Spring and Fall

P

3

6

Su

28

SD

3

Tecoma capensis (Tecomaria
capensis)

Cape Honeysuckle

Orange

Late Fall to Winter

S,V

8

6

Su

28

Africa

3

Ungnadia speciosa

Mexican Buckeye

Rose-pink

Spring

T

12

12

Su

10

CD

3

Viguiera stenoloba

Skeleton-leaf Goldeneye

Yellow

Summer to Fall

S

4-6

3-4

Su

10

TX, NM,
No. Mex.

3

Wedelia texana and cultivars
(Zexmenia hispida)

Rough Zexmenia, Devil's River

Orange, Yellow

Spring through Fall

S

2-3

2-4

Su

10

SW U.S.,
TX

3

Xylosma congestum

Xylosma

insignificant

Spring

T,S

15

15

Su

15

China

3

Zauschneria californica & varieties

Hummingbird Trumpet

Red, Orange

Summer and Fall

Gc

2

2

Su

20

SD

3

Zephyranthes spp. & varieties

Rain Lily

varies by speciesWhite, Rose, Pink

Summer

Gc,P

1

1.5

Su

0

S. Africa

February 2010

Yes

Yes

Page 30 of 30

Tucson Active Management Area Denied Plants
Botanical Name

Common Name

Explanation

Aquilegia chrysantha

Yellow Columbine

high water use

Carex pansa

California Meadow Sedge

high water use

Carex perdentata

Texas Meadow Sedge

high water use

Carex tumulicola

Berkeley Sedge

high water use

Chitalpa tashkentensis 'pink dawn'

Chitalpa

comment this is a cultivar of a plant removed from the list

Conoclinium (eupatorium) greggii

Boothill

high water use

Cortaderia selloana 'pumila'

Dwarf Pampas Grass

high water use

Drosanthemum speciosum 'rosea'

Iceplant

high water use

Duranta erecta 'sweet memory'

Golden Dew Drop

high water use

Dyssodia acerosa

Dogweed

similar plant already listed

Erigeron karvinskia 'profusion'

Santa Barbara Daisy

high water use

Gaura lindheimeri 'siskiyou'

Pink Gaura

high water use

Gaura lindheimeri 'whirling butterflies'

White Gaura

high water use

Hibiscus x 'moy grande'

Hibiscus

high water use

Juglans major

Arizona Walnut

high water use

Loncieta x americana

Pam's Pink Honeysuckle

high water use

Morus microphylla

Texas Mulberry

illegal to plant in Pima Co. due to pollen

Muhlenbergia annua

Hairawn Muhly

need Tucson growth info.

Muhlenbergia capillaris

Muhlenbergia

high water use

Muhlenbergia wrightii

Spike Muhly

need Tucson growth info.

Panicum virgatum 'prairie sky'

Switch Grass

high water use

Thursday, October 28, 2004

Page 1 of 2

Botanical Name

Common Name

Explanation

Plantanus mexicana

Mexican Sycamore

high water use

Platanus wrightii

Arizona Sycamore

high water use

Plumbago scandens

Summer Snow

high water use

Podranea ricasoliana

Pink Trumpet Vine

high water use

Poulownia kawakami

Sapphire Dragon

need Tucson growth info.

Ruselia equisteiformis

Coral Fountain

high water use

Saccharum ravennaie

Ravenna Grass

high water use

Stachys coccinea

Texas Betony

high water use

Symphotrichum praeltum

Rodney's Aster

high water use

Ulmus parvifolia semperviren

Evergreen Elm

high water use

Vetiveria zizanioides

Vetiver

high water use

Viguiera annua

Golden Eye

similar plant already listed

Viguiera longiflora

Viguiera

similar plant already listed

Viguiera multiflora

Viguiera

similar plant already listed

Vitis californica 'roger red'

Red California Grape

high water use

Thursday, October 28, 2004

Page 2 of 2

Tucson Active Management Area Deleted Plants
Botanical Name

Common Name

Abronia villosa

Sand Verbena

not widely available, vulnerable to predation

Acacia abyssinica

Abyssinian Acacia

freezes easily, high water use

Catalpa x chilopsis

Chitalpa

high water use

Eragrostis lehmanniana

Lehmann's Love Grass

invasive

Eragrostis lehmanniana-x E. atherstoni

Cochise Love Grass

invasive

Festuca megalura

Zorro Fescue

invasive, weedy annual

Hilaria jamesii

Galleta Grass

high elevation grass >5000'

Panicum virgatum

Switch Grass

weedy annual, not available

Pennisetum setaceum

Green Fountain Grass

invasive

Rhus lancea

African Sumac

invasive, competes with native plant life

Salvia splendens

Sage, Scarlet

high water use

Setaria macrostachya

Plains Bristle Grass

invasive, weedy annual

Tamarix aphylla

Athel Tree, Tamarisk

invasive roots, poor urban tree

Tamarix parviflora/chinensis

Spring Flowering Salt Cedar

invasive

Yucca recurifolia (pendula)

Pendulous/Curveleaf Yucca

poor performance, attacked by grubs/mites

Thursday, October 28, 2004

Explanation

Page 1 of 1

Tucson Active Management Area Plants to be Tested for Suitability
Botanical Name
Acalypha monostachya

Common Name
Raspberry Fuzzies

Aloe camperi

NCN

Aloe dawei

Dawe's Aloe

Aloe dichotoma

Kokerbom

Aloe marlothii

NCN

Aloe sinkatana

NCN

Aloysia virgata

Incense Bush

Andropogon gerardii

Big Bluestem

Artemisia arborescens

Silvery Sagebrush

Asclepias tuberosa

Butterfly Bush

Bauhinia mexicana

Mexican Orchid Tree

Caryopteris x clandonensis 'dark knight'

Blue Mist

Cassia oliogophylla

Outback Cassia

Eucalyptus salmonophloia

Salmon Gum

Eucalyptus salubris

Gimlet

Malpighia glabra

Barbado Cherry

Manfreda Maculosa

Texas Tuberose

Parthenocissus sp.

Hacienda Creeper

Pavonia lasiopetala

Rock Rosemallow

Pennisetum setaceum 'eaton canyon'

Fountain Grass- possibly invasive-a different cultivar was previously removed

Perovskia atriplicifolia

Russian Sage

Rhus lanceolata

Flame Leaf Sumac- possibly invasive

Salvia coahuilensis

NCN

Sophora affinis

Texas Sophora

Sophora arizonica

Arizona Neclacepod

Sorghastrum nutans

Indian Grass

Tecoma hybrid 'sunrise'
Tecoma sp. 'orange jubilee'
Tecoma Stans 'gold star'

Thursday, October 28, 2004

Page 1 of 1