The City of Davis, in conjunction with the UC Davis Arboretum & Public Garden, worked with CAL FIRE, Tree Davis, UC Agriculture and National Resources, USDA Forest Service, Redwood Barn Nursery as well as several local tree experts, to not only update the City’s previous guiding tree species document, the "Master Tree List," but to re-tool the way these lists are created and managed. Utilizing a data-driven approach, the Climate-Ready Tree Species working group created a model for determining a tree species adaptability to surviving in Davis’s current and projected future climate.

The Climate-Ready Tree lists that were developed are below and can be utilized by anyone to select appropriate tree species for their project, whether it is a new development or a homeowner wanting to add trees to their property.

Coming Soon: Planting Location Type Definitions

Drought Tolerant Trees for General Landscape Areas

These drought-tolerant trees are able to thrive with low- or no-irrigation. They have been selected for use in low- to no-irrigation areas (using WUCOLS guidelines) in sites with these characteristics:

Medium- to low-intensity public use
Not near a roadway and more than 6 feet from pavement or structures
Planting area and soil volume not restricted, greater than 12 feet
Site does not flood

Example sites where these trees might flourish best include: yards/lawns, gardens, campus, parks, commercial lots, and greenbelt sites (not in turf). Keep in mind these trees will still require dedicated watering when being established.

Legend

Very low water use – Limited to zero irrigation
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Low water use – Some level of irrigation
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Medium – high water use – Turf level irrigation
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Showy flowers
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Fall color
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Attracts pollinators

Small Trees

Scientific Name	Common Name	Width (feet)	Height (feet)	Type	Notes
Acca sellowiana -	Pineapple guava	18 - 25	10 - 25	evergreen	Green leaves with grey beneath provide great contrast. Multi-trunked. Tough, drought tolerant. Showy, purple, red, white flower in spring. Edible flowers and fruit. Concerns around fruit litter.
Acer buergerianum -	Trident maple	20 - 25	20 - 25	deciduous	Fast growth but moderate size. Fall color variable but pretty. Attractive bark. Concerns around extreme heat tolerance. ISHB lethal.
Aesculus californica -	California buckeye	20 - 30	10 - 25	deciduous	CA Native. Showy white flowers attract butterflies and hummingbirds in the spring. Summer decidious. Concerns around extreme heat tolerance and mild toxicity to European honeybees. ISHB host.
Arbutus unedo -	Strawberry tree	20 - 35	20 - 35	evergreen	Dark green leaves, dense crown, heavy crops of bright orange berries. Showy, white flower in fall, winter. Smaller understory species, multi-trunk, can be messy (fruit-litter).
Arctostaphylos manzanita -	Common manzanita	5 - 10	10 - 15	evergreen	CA Native. Showy, pink, white flowers in winter. Very attractive to hummingbirds. Mahogany-red bark. Smaller, slow growing understory species, multi-trunk. Prefers well-drained soils. Concerns around extreme heat tolerance, root diseases, fruit and flower litter.
Callistemon viminalis -	Weeping Bottlebrush	15 - 20	15 - 20	evergreen	Smaller, multi-trunk understory species. Fast growth, weeping habit, very elegant little tree. Some showy red flower blooms nearly all year. Very attractive to hummingbirds, excellent pollinator, but can be messy (fruit/flower-litter).
Cercis canadensis var. texensis 'Oklahoma' -	Oklahoma redbud	15	15	deciduous	Large shiny leaves. Round crown. Very showy pink flowers in the spring. Most tree-like Cercis. Susceptible to red humped caterpillars.
Cercis occidentalis	Western redbud	10 - 20	10 - 20	deciduous	CA Native, holds cultural significance for Native American tribes in California, particularly for basketry, and is also used for food and medicine. Naturally multi-trunk, shrubby. Showy, pink-purple flowers in spring. Susceptible to red humped caterpillars and can show signs of stress during extreme heat.
Chilopsis linearis -	Desert willow	10 - 20	15 - 30	deciduous	CA Native. Showy lavender, pink, rose flowers all summer attract hummingbirds and carpenter bees. Very heat and drought tolerant. Fast growing. Concerns around branch strength, sun scald and pod litter.
Chilopsis linearis 'Bubba' -	Bubba desert willow	10 - 15	15 - 20	deciduous	CA Native. Cultivar with magenta pink flowers in summer, fall. Fast growing, very heat tolerant, minimal pod litter. Concerns around weak branch strength and sun scald.
Chilopsis linearis 'Burgundy' -	Burgundy desert willow	10 - 20	15 - 30	deciduous	CA Native. Showy, dark magenta-pink flowers in spring, summer, fall. Fast growing, very heat tolerant. Concern around potential pod litter, branch strength and sunscald.
Cotinus coggygria -	Smoke tree	10 - 18	10 - 15	deciduous	Dark burgundy color makes great accent. Typically multi-trunk. Showy, lavender, purple flower in spring. Concerns around drought tolerance and branch strength.
Eriobotrya japonica -	Loquat	15 - 30	15 - 30	evergreen	Big bold glossy leaves provide tropical appearance. Very flavorful fruit. Showy, white flower in fall. Concerns around susceptibility to fireblight and wet fruit litter.
Heteromeles arbutifolia -	Toyon	8 - 15	15 - 25	evergreen	CA Native. Large shrub can be trained up as multi-trunk tree. White flowers attract beneficials during the summer. Berries are showy in winter. Reliable. Concerns around extreme heat tolerance, susceptibility to fireblight and scale insects.
Juniperus chinensis 'Torulosa' -	Hollywood juniper	6 - 10	10 - 15	evergreen	Rich dark green needles. Interesting twisted growth habit. Very tough. Adaptable. Shrub-like.
Juniperus scopulorum	Rocky Mountain juniper	10	20	evergreen	Many cultivars exist. Most have upright, columnar growth habit. Green or grey needles. Concerns around extreme heat tolerance.
Lagerstroemia indica 'Arapaho' -	Arapaho crape myrtle	8 - 10	15 - 20	deciduous	Hybrid. Strong dark pink-red flowers in summer. Upright growth habit. Good mildew resistance. Concerns around overplanting and aphids.
Lagerstroemia indica 'Dynamite' -	Dynamite crape myrtle	10 - 20	20 - 25	deciduous	Cultivar with reddest flowers to date. Upright grower. Good mildew resistance. Concerns around aphids and overplanting.
Lagerstroemia indica 'Red Rocket' -	Red Rocket crape myrtle	15 - 20	20 - 30	deciduous	Tall, upright grower with showy, red flower in midsummer, fall. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Catawba' -	Catawba crape myrtle	10 - 15	15 - 20	deciduous	Soft lavender flowers in summer. Good fall color. Mildew resistant. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Centennial Spirit' -	Centennial Spirit crape myrtle	10 - 15	10 - 20	deciduous	Mildew resistant. Showy, hot pink flowers in summer. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Cherokee' -	Cherokee crape myrtle	15 - 20	15 - 20	deciduous	Mildew resistant. Showy, coral-red flower in midsummer, fall. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Firebird' -	Firebird crape myrtle	8 - 10	10 - 15	deciduous	Tall, fast-growing. Dark red-pink, flowers don't fade. Concerns with aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Muskogee' -	Muskogee crape myrtle	10 - 15	15 - 20	deciduous	Large spreading variety with light lilac flowers in summer. Great fall color. Mildew resistant. One of the more successful crape myrtles. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Natchez' -	Natchez crape myrtle	15 - 25	20 - 25	deciduous	The largest variety in height and spread. White flowers are profuse. Excellent fall color. Concerns around overplanting and aphids.
Lagerstroemia x (indica x fauriei) 'Tuscarora' -	Tuscarora crape myrtle	15 - 18	18 - 25	deciduous	Dark pink flowers, relatively upright growth habit. Mildew resistant. Concerns around overplanting and aphids.
Lagerstroemia x (indica x fauriei) 'Zuni' -	Zuni crape myrtle	8 - 10	9 - 12	deciduous	Mildew resistant. Showy, purple-red flowers in midsummer. Concerns around aphids and overplanting.
Myrtus communis -	Common myrtle	20	15 - 20	evergreen	Dense growth, glossy dark green leaves. Fragrant white flowers and color. Good for hedge or screen. More shrub-like, very tough. Susceptible to phytophthora.
Olea europaea 'Hills of Santa Cruz' -	Santa Cruz olive	10 - 20	10 - 20	evergreen	Big, vigorous fruitless variety. Concerns around allergenic pollen, susceptibility to borers and scale insects.
Olea europaea 'Majestic Beauty' -	Majestic Beauty olive	25 - 30	25 - 30	evergreen	Big, vigorous fruitless variety. Concerns around allergenic pollen, susceptibility to borers and scale insects.
Olea europaea 'Western Weeping' (Hidshurtleff) -	Western Weeping olive	15 - 20	20 - 30	evergreen	Dense rounded growth habit, semi-weeping. Fruitless. Concerns around allergenic pollen, susceptibility to borers and scale insects.
Olea europaea 'Wilsoni' -	Wilson's olive	20 - 30	20 - 30	evergreen	Shrubby, smaller fruitless variety. Concerns around allergenic pollen, susceptibility to borers and scale insects.
Parkinsonia 'Desert Museum'	Desert Museum palo verde	20 - 25	15 - 20	deciduous	Fast-growing when young. Light shade. Long bloom season of showy, yellow flowers in spring-summer. Very drought and heat tolerant. Concerns around fast growth causing splitting.
Punica granatum -	Pomegranate	15	20	deciduous	Multi-trunked, can be trained as a small tree. Tolerant of heat and drought. Showy yellow fall color. Very showy, orange, pink, red flowers in spring, summer. Edible fruit. Concerns around wet fruit litter and spines/spikes.
Punica granatum 'California Sunset' -	California sunset flowering pomegranate	8 - 10	8 - 10	deciduous	Shrub-like. Fruitless-cultivar. Shiny leaves, with golden fall color. Showy orange flower in spring, summer. Very tolerant of heat and drought.
Punica granatum 'Nochi Shibari' -	Nochi Shibari flowering pomegranate	8 - 12	10 - 15	deciduous	Shrub-like. Fruitless-cultivar. Shiny leaves, with golden fall color. Showy orange-peach flower in spring, summer. Very tolerant of heat and drought.
Vitex agnus-castus -	Chaste tree	15 - 20	10 - 15	deciduous	Showy, blue, lavender flowers in fall, summer attract bees. Shrub-like can be trained as a tree. Lot's of cultivars, heat & drought tolerant. Concerns around reseeding (high invasive potential).
Xylosma congesta -	Xylosma	8 - 15	8 - 10	evergreen	Shiny leaves, bronze new growth. Flowers very attractive to bees. Large shrub can be pruned up as tree. Very tolerant of heat and drought. ISHB host.
Ziziphus jujuba -	Jujube; Chinese Date	10 - 30	15 - 30	deciduous	Shiny leaves, very tough tree with large crops of edible fruit. Many cultivars. Very heat and drought tolerant. Concerns around fruit litter, root suckering and thorns.

*Width - width of tree canopy **Height - height of tree at maturity

Medium Trees

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Notes
Arbutus 'Marina' -	Marina Strawberry tree	30	20 - 40	evergreen	Smaller, multi-trunk, understory species. Proving to be very adaptable. Attractive large, shiny leaves. Showy pink-rose colored flowers all season, especially in winter. Attract hummingbirds. Beautiful red bark. Light fruit crops can be messy. Concerns around over-planting and extreme heat tolerance.
Brachychiton populneus -	Bottle tree	30	30 - 50	evergreen	Upright growth habit, interesting showy, white flower in spring and summer. Good windbreak. Tough, hardy tree. ISHB host.
Hesperocyparis arizonica (syn. Cupressus arizonica) -	Arizona cypress	20	30 - 40	evergreen	Large, shaggy conifer. Large cones, medium branch strength. Rec variety Glabra.
Laurus nobilis -	Grecian bay laurel	15 - 30	15 - 40	evergreen	Very upright growth habit, branches heavily from the base. Good for screening and privacy. Concerns around sunscald.
Laurus 'Saratoga' -	Saratoga laurel	15 - 30	15 - 40	evergreen	Round crown, somewhat open canopy. Large leaves are shiny dark green. Fruitless.
Pistacia chinensis -	Chinese pistache	25 - 35	25 - 35	deciduous	Very widely planted species. Male cultivars are more reliable fall color and lack seeds. Cultivars recommended. Concerns around overplanting and reseeding.
Pistacia chinensis 'Keith Davey' -	Keith Davey Chinese pistache	30 - 45	30 - 45	deciduous	Male variety. Bright red fall color. Very adaptable. Popular cultivar. Concerns around winter flood tolerance.
Pistacia 'Red Push' -	Red Push pistache	20 - 40	25 - 40	deciduous	New cultivar proving very successful overall. Red new growth and fall color. Community Canopy tree. Potential need for additional young tree maintenance care.
Prosopis glandulosa 'Maverick' -	Maverick mesquite (thornless)	25 - 35	25 - 35	deciduous	Very tough, drought tolerant. Thornless. Showy, yellow flower in summer. USFS-CRTS tree. No irrigation needed once established. Requires additional pruning.
Prunus ilicifolia lyonii	Catalina cherry	20 - 30	25 - 35	evergreen	CA Native. Large upright shrub usually grown as a hedge or screen, but can be trimmed up as a tree. Edible fruit. Showy, cream, white flower in spring. Native, very shade tolerant. Concerns around reseeding and wet fruit litter.
Quercus buckleyi -	Texas red Oak	30 - 50	30 - 50	deciduous	Often multi-trunk. Yellowish-green leaves turn bright red in fall. Fast growing. Can be marcescent. Concerns around reseeding.
Quercus canbyi -	Canby's Oak	30 - 50	40 - 50	semi-evergreen	Dark, glossy-green leaves. Community Canopy tree. Fast growing oak, good form, minimal maintenance. Concerns around rot, disease and weak wood.
Quercus fusiformis -	Escarpment live oak	20 - 40	20 - 50	semi-evergreen	Tough, slow growing southwestern live oak (may be briefly deciduous) that tolerates heat.
Quercus gravesii -	Chisos red oak	35	30 - 60	deciduous	Fast growing, medium-sized tree. From the southwest. Semi-decidious. Concerns with anthracnose.
Quercus muehlenbergii -	Chinquapin oak	50 - 60	40 - 50	deciduous	Spreading, round crown. Shiny leaves. Acorns "are among the sweetest of any oak." Grows in the Texas mountains/canyons. Can be marcescent. Concerns around mildew.
Quercus wislizeni -	Interior live oak	40 - 80	30 - 70	evergreen	CA Native. Variable growth habit. Dark green leaves. Sensitivity to irrigation. Concerns around caterpillars, extreme heat tolerance, susceptibility to Sudden Oak Death.
Schinus molle -	California pepper	25 - 40	25 - 50	evergreen	CA Native. Historic species in California. Shiny leaves, interesting bark, weeping growth habit. Bright red berries on female trees. Aromatic with a weeping appearance. Very drought tolerant. Concerns around reseeding, hard freeze damage, sap drop, nursrey rootstock, branch strength, and aphids.
Searsia lancea (syn. Rhus lancea) -	African sumac	20 - 35	25 - 30	evergreen	Shiny dark green leaves, attractive rugged red-brown bark. Shrub-like, large, extremely tough. Zero irrigation needed once established. Concerns around root sprouts and litter.

*Width - width of tree canopy **Height - height of tree at maturity

Large Trees

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Notes
Carya illinoinensis -	Pecan	70	70 - 100	deciduous	Very tall, fast-growing trees. Tolerance range includes drought and irrigated spaces. Needs early branch training. Concerns around aphids and reseeding.
Cedrus atlantica 'glauca' -	Blue Atlas cedar	25 - 40	40 - 60	evergreen	Dense growth, classic pyramidal shape. Needles are silvery-blue. Potential for sapsucker damage.
Cedrus deodara -	Deodar cedar	20 - 30	40 - 60	evergreen	Graceful spreading habit with slightly weeping branches. Attractive blue-green color. Tough, reliable. Concerns around extreme heat tolerance.
Celtis australis -	European hackberry	40 - 50	40 - 70	deciduous	Tough tree. Tolerant of wind, heat, dry and alkaline soils. Somewhat upright growth habit. Concerns around reseeding and possible root damage.
Celtis occidentalis -	Common hackberry	40 - 50	45 - 80	deciduous	Tough tree. Tolerant of wind, heat, dry and alkaline soils. Round crown, spreading growth habit. Concerns around extreme heat tolerance, aphids, reseeding, and possible root damage.
Cinnamomum camphora -	Camphor	50 - 60	50 - 65	evergreen	New growth pink, ages to shiny yellow green. Aromatic leaves. Very tough and wind tolerant. Concerns around potential root damage.
Morus alba 'Fruitless' -	Fruitless mulberrry	30 - 45	20 - 30	deciduous	Very popular in rural areas for fast growth and dense shade. Very tough, fast-growing species. Concerns around root damage, branch strength and susceptibility to borers.
Pinus brutia var. eldarica	Eldarica pine, Afghan pine, Mondell pine	15 - 25	30 - 80	evergreen	Fast growing with "classic pine shape." Tolerates heat, wind, poor soil. Concerns around pollen, sap and pine cones.
Pinus canariensis -	Canary Island pine	20 - 35	50 - 80	evergreen	Large pine, heavily planted in Davis in the 60s-70s. Very upright growth habit, drooping needles. Drought tolerant. Concerns around pollen, sap and pine cones.
Pinus halepensis	Aleppo pine	20 - 40	30 - 60	evergreen	Large, fast growing pine with small cones. Very heat and drought tolerant. Concerns around long-term stability.
Quercus agrifolia -	Coast live oak	20 - 70	20 - 70	evergreen	CA Native, native to the Delta. Widely planted, naturalizing locally. Adaptable for privacy and screening. Great for wildlife. Concerns around extreme heat tolerance, disturbance sensitivity, and susceptibility to SOD and phyophthora. ISHB host.
Quercus douglasii -	Blue oak	40 - 50	50 - 65	deciduous	Native, from the foothills. Slow growing oak, low-spreading branches. Attractive mix of fall colors. Extremely drought tolerant. Susceptible to MOB.
Quercus ilex -	Holly oak	30 - 60	30 - 60	evergreen	Dense round crown, dark green leaves. Can be clipped as hedge, pruned for size. Concerns around sooty mold (due to over watering). Likely susceptible to MOB.
Quercus lobata	Valley oak	50	50 - 70	deciduous	Native, keystone species. Supports a plethora of wildlife. Make up a large percentage of Davis' canopy. Drought tolerant. Concerns around extreme heat tolerance. Susceptible to MOB. ISHB can kill.
Quercus suber -	Cork oak	70	70	evergreen	Widely planted locally. Very tolerant of drought, heat. Good nursery stock is critical for this thick, rugged bark oak. Concerns with reseeding and phytophtora. ISHB host.
Quercus virginiana -	Southern live oak	60 - 100	40 - 80	semi-evergreen	Moderately fast growing, gets very large with considerable spread. Remarkably tough. Very adaptable to irrigation and drought.
Ulmus 'Morton' (Accolade) -	Accolade elm	25 - 40	50 - 60	deciduous	A top performer in the National Elm Trial. Shiny leaves are dark green. Nice vase-shaped growth habit. Yellow fall color. Resistant to elm leaf beetle. Slower growing, requires less maintenance.. Concerns around extreme heat tolerance and branch strength.
Ulmus 'Morton Glossy' (Triumph) -	Triumph elm	35 - 40	50 - 60	deciduous	A top performer in the National Elm Trial. Grows fast, requires high level of maintenance. Very symmetrical habit. Dark glossy green leaves. Possible resistant to elm leaf beetle. Concerns around extreme heat tolerance, elm leaf beetle and leaf browning issues.
Ulmus parvifolia 'Drake' -	Drake Chinese elm	35 - 50	35 - 45	semi-deciduous	Widely planted in California. Graceful arching, weeping habit. Very attractive bark. Has unique bark. Requires a high level of maintenance. Can defoliate during summer drought.

*Width - width of tree canopy **Height - height of tree at maturity

Rare Trees

These trees meet the City's climate ready qualifications, but they may be very difficult to find at plant nurseries.

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Tree Size	Notes
Acacia pendula -	Weeping acacia	15 - 20	20 - 30	evergreen	S	Beautiful weeping form tree. Silver color provides great contrast. Accent or focal point. Showy, yellow flower in winter. Concerns around being slightly frost tender and branch strength. ISHB host.
Arbutus andrachne	Turkish madrone	15 - 30	15 - 30	evergreen	S	Smaller understory species, multi-trunk. Shiny leaves, mahogany bark. Showy, white flowers attract hummingbirds. Concerns around extreme heat tolerance and fruit litter.
Casuarina cunninghamiana -	River she-oak	30	70	evergreen	L	Extremely tough tree. Tolerant of dry or wet soil, salinity, heat, wind. Concerns around mess of color/fruit/flower litter and reseeding.
Ceratonia siliqua -	Carob tree	30 - 40	30 - 40	evergreen	M	Glossy leaves, dense crown. Extremely drought tolerant. Concerns with high litter (male - flowers, female - pods) and hard freeze tolerance.
Cercis griffithii -	Afghan redbud	12 - 15	15 - 20	deciduous	S	Tough species, similar to our native redbud. Showy, pink flower in spring. Smaller understory species, multi-trunk. Concern around extreme heat tolerance.
Cercocarpus betuloides -	Mountain ironwood	10 - 20	10 - 20	evergreen	S	CA Native. Large multi-trunk, shrub. with dark leaves, can be trained as small tree. Interesting feathery fruit.
Cercocarpus betuloides var. blancheae -	Island mountain mahogany	6 - 10	10 - 20	evergreen	S	CA Native. Smaller understory species, multi-trunk with dark leaves, can be trained as small tree. Interesting feathery fruit. Concerns around extreme heat tolerance.
Cercocarpus traskiae -	Catalina mahogany	8 - 15	10 - 20	evergreen	S	CA Native. Endangered species. Smaller understory species, multi-trunk, with thick, leathery leaves (woolly texture). Extremely drought tolerant once established. Concerns around extreme heat tolerance.
Chilopsis linearis 'Art's Seedless' -	Art's Seedless desert willow	15 - 25	15 - 25	deciduous	S	CA Native. Podless variety Showy, pink, rose flower. Fast growing, very heat tolerant. Concerns around weak branch strength and sun scald.
Chilopsis linearis 'Lois Adams' -	Lois Adams desert willow	15 - 20	15 - 20	deciduous	S	CA Native. Podless variety. Showy, pink flowers. Fast growing, very heat tolerant. Concerns around weak branch strength and sun scald.
Chilopsis linearis 'Monhews' -	Timeless Beauty desert willow	15 - 20	15 - 20	deciduous	S	CA Native. Podless variety. Showy, lavender flower in summer, fall. Fast growing, very heat tolerant. Concerns around weak branch strength and sun scald.
Dermatophyllum secundiflorum -	Texas mountain laurel	10 - 15	15 - 25	evergreen	S	Showy blue, lavender, white sweet-scented flowers in late winter resemble wisteria. Concerns around seed toxicity.
Eucalyptus aparrerinja (misID in trade as Corymbia papuana) -	Ghost gum	20 - 35	30 - 50	evergreen	M	Open crown makes high, light shade. Pale cream-to-white bark is a main feature. Very tough and adaptable.
Eucalyptus nicholii	Nichol's willow leaf peppermint	15 - 40	40 - 50	evergreen	M	Elegant small tree looks more like a willow than a eucalyptus. Mint-scented color. Concerns around extreme heat tolerance.
Eucalyptus polyanthemos -	Silver dollar gum	15 - 45	30 - 75	evergreen	L	Big tree whose powder-blue juvenile growth is used in flower arrangements. Concerns around hard freeze.
Hesperocyparis arizonica var. glabra (syn. Cupressus glabra) -	Arizona cypress	20	40 - 50	evergreen	M	Very low maintenance tree with good heat and drought tolerance.
Juniperus chinensis -	Chinese juniper	20 - 25	20 - 60	evergreen	M	Cultivars are usually grown and more widely available.
Juniperus monosperma	One-Seed juniper	10 - 35	10 - 35	evergreen	M	Native to the southwest, tolerant of heat and drought.
Maclura pomifera 'White Shield' -	White Shield Osage orange	35	35	deciduous	M	Thornless male (fruitless) variety. Thick canopy. Vigorous. Tolerates heat, cold, wind, poor soil, alkalinity, wet or dry conditions. Concerns around root sprouting.
Melia azedarach -	Chinaberry	15 - 25	30 - 50	deciduous	M	Shiny green leaves, profuse lilac-colored fragrant flowers in spring and summer. Very tolerant of heat, wind, poor soil, drought. Concerns around fruit litter, reseeding, weak branch strength, and toxicity of berries.
Melia azedarach 'Elite' -	'Elite' chinaberry	15 - 20	30 - 40	deciduous	M	Fruitless variety. Showy, pink flowers in spring. Concerns around weak branch strength.
Melia azedarach 'Umbraculiformis' -	Texas umbrella tree	30 - 40	30 - 40	deciduous	M	Shiny compound leaves, dense canopy, interesting tight growth habit. Showy, pink, purple lavendar flower in spring, summer. Concerns with branch strength and fruit litter (toxic).
Pinus brutia	Calabrian pine	15 - 25	30 - 80	evergreen	L	Not commonly planted. See P. b. var eldarica. Large pine. Concerns around pollen, sap and pine cones.
Pinus coulteri	Coulter pine	30 - 40	80	evergreen	L	Big spreading pine with deep green needles. CA Native pine, native to the costal range. Tolerant of heat, wind, drought. Concerns around extreme heat tolerane and large pine cones.
Pinus sabiniana -	Foothill pine, gray pine	15 - 20	60 - 70	evergreen	L	Pale grey-green needles, open growth habit. CA Native, supports native moth and butterfly populations. Concerns with extreme heat tolerance, aphids, branch strength and large cones.
Pinus torreyana	Torrey pine	20 - 25	40 - 50	evergreen	L	CA Native, endangered. Very upright and symmetrical when grown away from coast and the female does not make cones here. Grey-green needles. Somewhat open growth habit. Concerns around extreme drought tolerance.
Pistacia chinensis 'Pearl Street' -	Pearl Street Chinese pistache	25 - 30	40 - 45	deciduous	M	Male variety. Good fall color. Concerns around winter flood tolerance.
Platanus racemosa 'Roberts' -	Roberts Western sycamore	35 - 40	45 - 50	deciduous	L	CA Native. Big leaves, beautiful bark open crown. Resistant to anthracnose. Concerns around extreme heat tolerance. ISHB lethal.
Prunus ilicifolia	Holly leaf cherry	10 - 25	10 - 30	evergreen	S	Native. Large upright shrub usually grown as a hedge or screen, but can be trimmed up as a tree. Edible fruit. Showy, cream, white flower in spring. Very shade tolerant. Concerns around reseeding and wet fruit litter.
Quercus ithaburensis -	Mount Tabor oak	30 - 60	30 - 60	deciduous	M	Medium-size tree, rounded canopy. Rare, adaptable Mediterranean species with large acorns. Successful with no irrigation post establishment.
Quercus oblongifolia -	Mexican blue oak	20 - 30	30 - 60	semi-evergreen	M	Bluish-green leaves. Hardy, southwest oak species that is found on the border between the desert and the oak zone.
Quercus tomentella	Island oak	25 - 40	20 - 50	evergreen	M	CA Native. Dark glossy leaves, canopy very upright when young, then spreads as it matures. Concerns around extreme heat tolerance.
Styphnolobium japonicum -	Japanese pagoda	40 - 70	40 - 70	deciduous	L	Showy, white flower in summer. Concerns around messy pods.
Ulmus parvifolia -	Lacebark Elm	50 - 70	40 - 60	semi-deciduous	L	Fast-growing with variable growth habit but generally weeping. Bark patterns are very attractive. Very heat tolerant. Concerns around over-extending branches and reseeding.
Ulmus parvifolia ‘Emer I’ (Athena) -	Athena Chinese elm	40 - 50	35 - 45	semi-deciduous	M	Fast grower with considerable spread. Concerns around reseeding.
Ulmus parvifolia 'Allee' -	Allee Chinese elm	35 - 55	60 - 70	semi-deciduous	L	Fast grower with upright growth and vase-shaped habit. Concerns around reseeding.
Umbellularia californica -	California bay	60 - 75	60 - 75	evergreen	L	CA Native, distinct California scent. Aromatic leaves and flowers. Oils in leaf can be mildly toxic. Concerns with extreme heat tolerance, phytophthora and SOD.

*Width - width of tree canopy **Height - height of tree at maturity

Trees for Areas with Regular Irrigation

While these trees are suitable for our projected future climate, they have a higher irrigation need and have been selected for use in medium- to high-irrigation areas (using WUCOLS guidelines) in sites with these characteristics:

Medium- to low-intensity public use
Not near a roadway and more than 6 feet from pavement or structures
Planting area and soil volume not restricted, greater than 12 feet
Site does not flood

Example sites where these trees might flourish best include: irrigated yards, lawns, gardens, campus, parks, commercial lots and greenbelt sites, especially in turf.

Legend

the outline of a water droplet with only the bottom filled in with color, indicating that the tree uses a very low water

Very low water use – Limited to zero irrigation
the outline of a water droplet half filled in with color, indicating that the tree uses low water

Low water use – Some level of irrigation
the outline of a water droplet with more than half filled in with color, indicating that the tree uses medium water

the outline of a water droplet with more than half filled in with color, indicating that the tree uses medium water

Medium – high water use – Turf level irrigation
a purple flower, indicating that the tree has showy flowers

Showy flowers
fall color no background icon

Fall color
a bee, indicating that the tree attracts pollinators

Attracts pollinators

Small Trees

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Notes
Acca sellowiana -	Pineapple guava	18 - 25	10 - 25	evergreen	Green leaves with grey beneath provide great contrast. Multi-trunked. Tough, drought tolerant. Showy, purple, red, white flower in spring. Edible flowers and fruit. Concerns around fruit litter.
Acer buergerianum -	Trident maple	20 - 25	20 - 25	deciduous	Fast growth but moderate size. Fall color variable but pretty. Attractive bark. Concerns around extreme heat tolerance. ISHB lethal.
Acer ginnala	Amur maple	20 - 25	20 - 25	deciduous	Moderate growth, round crown. Concerns around extreme heat tolerance.
Acer truncatum	Chinese maple, Shantung maple	20 - 30	20 - 30	deciduous	Moderate growth rate, elegant habit. Very nice fall color. Concerns around extreme heat tolerance.
Arbutus unedo -	strawberry tree	20 - 35	20 - 35	evergreen	Dark green leaves, dense crown, heavy crops of bright orange berries. Showy, white flower in fall, winter. Smaller understory species, multi-trunk, can be messy (fruit-litter).
Callistemon viminalis -	Weeping Bottlebrush	15 - 20	15 - 20	evergreen	Smaller, multi-trunk understory species. Fast growth, weeping habit, very elegant little tree. Some showy red flower blooms nearly all year. Very attractive to hummingbirds, excellent pollinator, but can be messy (fruit/flower-litter).
Cercis canadensis var. texensis 'Oklahoma' -	Oklahoma redbud	15	15	deciduous	Large shiny leaves. Round crown. Very showy pink flowers in the spring. Most tree-like Cercis. Susceptible to red humped caterpillars.
Chionanthus retusus	Chinese fringe tree	6 - 12	10 - 20	deciduous	Smaller, multi-trunk, understory species. Brief but spectacular bloom of white flowers in late spring. Nice yellow fall color. Bark is an attractive winter feature. Extremely drought tolerant. UCD Arboretum Allstar.
Citrus x microcarpa	Calamondin	6 - 10	10 - 20	evergreen	Oval growth habit. Showy, fragrant white-purple flowers. Hardy, ornamental tart citrus (edible). Concerns around fruit litter, extreme heat and freeze tolerance.
Cotinus coggygria -	Smoke tree	10 - 18	10 - 15	deciduous	Dark burgundy color makes great accent. Typically multi-trunk. Showy, lavender, purple flower in spring. Concerns around drought tolerance and branch strength.
Eriobotrya japonica -	Loquat	15 - 30	15 - 30	evergreen	Big bold glossy leaves provide tropical appearance. Very flavorful fruit. Showy, white flower in fall. Concerns around susceptibility to fireblight and wet fruit litter.
Juniperus chinensis 'Torulosa' -	Hollywood juniper	6 - 10	10 - 15	evergreen	Rich dark green needles. Interesting twisted growth habit. Very tough. Adaptable, tough more shrub-like.
Lagerstroemia indica 'Arapaho' -	Arapaho crape myrtle	8 - 10	15 - 20	deciduous	Hybrid. Strong dark pink-red flowers in summer. Upright growth habit. Good mildew resistance. Concerns around overplanting and aphids.
Lagerstroemia indica 'Dynamite' -	Dynamite crape myrtle	10 - 20	20 - 25	deciduous	Cultivar with reddest flowers to date. Upright grower. Good mildew resistance. Concerns around aphids and overplanting.
Lagerstroemia indica 'Red Rocket' -	Red Rocket crape myrtle	15 - 20	20 - 30	deciduous	Tall, upright grower with showy, red flower in midsummer, fall. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Catawba' -	Catawba crape myrtle	10 - 15	15 - 20	deciduous	Soft lavender flowers in summer. Good fall color. Mildew resistant. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Centennial Spirit' -	Centennial Spirit crape myrtle	10 - 15	10 - 20	deciduous	Mildew resistant. Showy, hot pink flowers in summer. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Cherokee' -	Cherokee crape myrtle	15 - 20	15 - 20	deciduous	Mildew resistant. Showy, coral-red flower in midsummer, fall. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Firebird' -	Firebird crape myrtle	8 - 10	10 - 15	deciduous	Tall, fast-growing. Dark red-pink, flowers don't fade. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Muskogee' -	Muskogee crape myrtle	10 - 15	15 - 20	deciduous	Large spreading variety with light lilac flowers in summer. Great fall color. Mildew resistant. One of the more successful crape myrtles. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Natchez' -	Natchez crape myrtle	15 - 25	20 - 25	deciduous	The largest variety in height and spread. White flowers are profuse. Excellent fall color. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Tuscarora' -	Tuscarora crape myrtle	15 - 18	18 - 25	deciduous	Dark pink flowers, relatively upright growth habit. Mildew resistant. Concerns around aphids and overplanting.
Lagerstroemia x (indica x fauriei) 'Zuni' -	Zuni crape myrtle	8 - 10	9 - 12	deciduous	Mildew resistant. Showy, purple-red flowers in midsummer. Concerns around aphids and overplanting.
Myrtus communis -	Common myrtle	20	15 - 20	evergreen	Dense growth, glossy dark green leaves. Fragrant white flowers and color. Good for hedge or screen. More shrub-like, very tough. Susceptible to phytophthora.
Photinia x fraseri	Red-tip photinia	8 - 15	15 - 30	evergreen	Popular shrub with bright red new growth can be trained as a small tree. Showy, white flower in spring. Susceptible to fireblight. Concerns with leaf scorch and sunscald.
Pittosporum tobira	Mock orange	5 - 15	10 - 25	evergreen	Large evergreen shrub with glossy dark green leaves, can be trained up as a small tree. Fragrant showy, cream, white flower in spring. Tough, adaptable tree. Concerns around suckering at the base.
Prunus caroliniana	Carolina laurel cherry	15 - 25	20 - 30	evergreen	Large upright shrub usually grown as a hedge or screen, but can be trimmed up as a tree. Showy, white flower in winter. Loved by wildlife. Concerns around reseeding and leaf spot disease.
Prunus cerasifera 'Krauter Vesuvius'	Purple leaf plum	15	20 - 25	deciduous	The classic purple-leaf plum, usually fruitless. Showy, pink flower in winter. Heavily planted.
Prunus cerasifera 'Purple Pony'	Purple Pony purple-leaf plum	10 - 12	10 - 12	deciduous	Purple-red color foliage on a large shrub that can be trained as a small tree. Pretty pale pink flowers in spring. Fruitless. Concerns with drought and extreme heat tolerance.
Prunus mume	Japanese apricot	30	30	deciduous	Showy, pink flower in winter. One of the earliest blooms in Davis, edible fruit (used for salting and pickling), liked by birds and bees. Relatively long-lived, tough. Concerns around drought tolerance.
Prunus mume 'Dawn'	Dawn flowering apricot	25	25	deciduous	Showy double pink flowers in winter. One of the earliest blooms in Davis, edible fruit, liked by bird. Concerns around drought tolerance.
Prunus persica	Flowering peach	25	25	deciduous	Showy, pink, rose, white flower in spring. Garden tree that can produce edible fruit, short-lived and requires heavy maintenance. Concerns around susceptability to peach leaf curl, wet fruit litter, and branch strength.
Prunus x blireiana	Flowering plum	12 - 15	12 - 15	deciduous	Burgundy new growth turns dark green. Very showy pink-rose flowers, very early in winter. Reliably fruitless. Adaptable, non-messy. Concerns around drought tolerance and lecanium scale.
Punica granatum -	Pomegranate	15	20	deciduous	Multi-trunked, can be trained as a small tree. Tolerant of heat and drought. Showy yellow fall color. Very showy, orange, pink, red flowers in spring, summer. Edible fruit. Concerns around wet fruit litter and spines/spikes.
Punica granatum 'California Sunset' -	California Sunset flowering pomegranate	8 - 10	8 - 10	deciduous	Shrub-like. Fruitless-cultivar. Shiny leaves, with golden fall color. Showy orange flower in spring, summer. Very tolerant of heat and drought.
Punica granatum 'Nochi Shibari' -	Nochi Shibari flowering pomegranate	8 - 12	10 - 15	deciduous	Shrub-like. Fruitless-cultivar. Shiny leaves, with golden fall color. Showy orange-peach flower in spring, summer. Very tolerant of heat and drought.
Rhaphiolepis 'Montic'	Majestic Beauty rhaphiolepis	8 - 10	10 - 25	evergreen	Big, bold, dark green leaves give tropical appearance. Large shrub can be trained as multi-trunk tree. Showy, pink flower in spring.
Sambucus mexicana	Mexican elderberry	10 - 20	10 - 20	deciduous	CA Native. Holds cultural significance for indigenous peoples, who have long valued it for food, medicine, and crafting materials, particularly its berries, flowers, and wood. Shiny compound leaves, lush appearance when irrigated. Very important for wildlife. Showy, cream, white flower in spring, summer. Federally protected (host to threatened Valley Elderberry Longhorn Beetle). Concerns around fruit toxicity in large quantities.
Vitex agnus-castus -	Chaste tree	15 - 20	10 - 15	deciduous	Showy, blue, lavender flowers in fall, summer attract bees. Shrub-like can be trained as a tree. Lot's of cultivars, heat & drought tolerant. Concerns around reseeding (high invasive potential).
Xylosma congesta -	Xylosma	8 - 15	8 - 10	evergreen	Shiny leaves, bronze new growth. Flowers very attractive to bees. Large shrub can be pruned up as tree. Very tolerant of heat and drought. ISHB host.
Ziziphus jujuba -	Jujube; Chinese Date	10 - 30	15 - 30	deciduous	Shiny leaves, very tough tree with large crops of edible fruit. Many cultivars. Very heat and drought tolerant. Concerns around fruit litter, root suckering and thorns.

*Width - width of tree canopy **Height - height of tree at maturity

Medium Trees

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Notes
Acer campestre	Hedge maple	25 - 35	25 - 35	deciduous	Small, slow-growing tree. Variable fall color. Concerns around extreme heat tolerance.
Acer macrophyllum	Bigleaf maple	30 - 50	40 - 50	deciduous	CA Native. Largest leaves of any maple. Can be a large tree. Concerns around extreme heat tolerance. ISHB lethal.
Acer rubrum 'October Glory'	October Glory red maple	25 - 35	40 - 50	deciduous	Red maple with round crown, dark red fall color. Showy, red flower in spring. Concerns around extreme heat tolerance.
Acer rubrum 'Red Sunset'	Red Sunset red maple	25 - 40	40 - 50	deciduous	Red maple with upright growth habit, good density, strong red fall color. Showy, red flower in spring. Concerns around extreme heat tolerance and branch strength.
Afrocarpus gracilior	Fern pine	10 - 20	35 - 50	evergreen	Easy to prune and shape. Can be grown as a hedge. Concerns around potential mild toxicity of the pollen and possible frost damage.
Arbutus 'Marina' -	Marina Strawberry tree	30	20 - 40	evergreen	Smaller, multi-trunk, understory species. Proving to be very adaptable. Attractive large, shiny leaves. Showy pink-rose colored flowers all season, especially in winter. Attract hummingbirds. Beautiful red bark. Light fruit crops can be messy. Concerns around over-planting and extreme heat tolerance.
Brachychiton populneus -	Bottle tree	30	30 - 50	evergreen	Upright growth habit, interesting showy, white flower in spring and summer. Good windbreak. Tough, hardy tree. ISHB host.
Carpinus betulus	European hornbeam	20 - 30	35 - 40	deciduous	Tough, slow-growing, somewhat formal growth habit. Marcesence. Concerns around leaf scorch and extreme heat tolerance.
Carpinus betulus 'Fastigiata'	European hornbeam (pyramidal)	40	40 - 50	deciduous	Narrow-growing variety of hornbeam well suited for urban landscapes. Marcescence. Concerns around leaf scorch and extreme heat tolerance.
Elaeocarpus sylvestris (syn. E. decipiens)	Japanese blueberry tree	20 - 30	20 - 60	evergreen	Narrow, upright grower with bright green leaves. Good for hedge or screening. Slow growing. Concerns around extreme heat tolerance.
Ginkgo biloba 'Autumn Gold'	Autumn Gold ginkgo	25 - 35	25 - 50	deciduous	Male variety selected for uniform growth habit and reliable yellow fall color. Possible need for more water in establishment period.
Ginkgo biloba 'Saratoga'	Saratoga ginkgo	30 - 40	30 - 40	deciduous	Male variety with dense, pyramidal growth habit, long drooping leaves. Concerns around extreme heat tolerance.
Laurus nobilis -	Grecian bay laurel	15 - 30	15 - 40	evergreen	Very upright growth habit, branches heavily from the base. Good for screening and privacy. Concerns around sunscald.
Laurus x 'Saratoga' -	Saratoga laurel	15 - 30	15 - 40	evergreen	Round crown, somewhat open canopy. Large leaves are shiny dark green. Fruitless.
Pinus thunbergii	Japanese black pine	20 - 35	25 - 30	evergreen	Easy to shape and prune as a garden feature. Bright green needles. Concerns around drought tolerance and over-watering.
Pistacia chinensis -	Chinese pistache	25 - 35	25 - 35	deciduous	Very widely planted species. Male cultivars are better for reliable fall color and lack of seeds. Concerns around overplanting and reseeding.
Pistacia chinensis 'Keith Davey' -	Keith Davey Chinese pistache	30 - 45	30 - 45	deciduous	Male variety. Bright red fall color. Very adaptable. Popular cultivar. Concerns with winter flood tolerance.
Pistacia 'Red Push' -	Red Push pistache	20 - 40	25 - 40	deciduous	New cultivar proving very successful overall. Red new growth and fall color. Community Canopy species. Potential need for additional young tree maintenance care.
Podocarpus macrophyllus	Yew pine	20	20 - 30	evergreen	Dark green color. Very upright growth habit. Can be pruned as hedge, screen, espalier. Concern around extreme cold, heat and drought tolerance.
Quercus buckleyi -	Texas red Oak	30 - 50	30 - 50	deciduous	Often multi-trunk. Yellowish-green leaves turn bright red in fall. Fast growing. Can be marcescent. Concerns around reseeding.
Quercus canbyi -	Canby's Oak	30 - 50	40 - 50	semi-evergreen	Dark, glossy-green leaves. Community Canopy species. Fast growing oak, good form, minimal maintenance. Concerns around rot, disease and weak wood.
Quercus fusiformis -	Escarpment live oak	20 - 40	20 - 50	semi-evergreen	Tough, slow growing southwestern live oak (may be briefly deciduous) that tolerates heat.
Quercus gravesii -	Chisos red oak	35	30 - 60	deciduous	Fast growing, medium-sized tree. From the southwest. Semi-deciduous. Concerns around anthracnose.
Quercus muehlenbergii -	Chinquapin oak	50 - 60	40 - 50	deciduous	Spreading, round crown. Shiny leaves. Acorns "are among the sweetest of any oak." Grows in the Texas mountains/canyons. Can be marcescent. Concerns around mildew.
Schinus molle -	California pepper	25 - 40	25 - 50	evergreen	CA Native. Historic species in California. Shiny leaves, interesting bark, weeping growth habit. Bright red berries on female trees. Aromatic with a weeping appearance. Very drought tolerant. Concerns around reseeding, hard freeze damage, sap drop, nursrey rootstock, branch strength, and aphids.
Taxus baccata 'Fastigiata'	Irish yew	6 - 10	15 - 20	evergreen	Narrow upright grower with dark green needles. Shade tolerant. Useful as hedge or screen. Concerns around extreme heat tolerance and berry toxicity.
Tilia cordata	Little-leaf linden	15 - 30	30 - 50	deciduous	Copious, showy, yellow fragrant flowers in summer, very attractive to bees. Habitat plant for lacewings. Pretty yellow fall color. Concerns around extreme heat tolerance and aphids.
Tilia tomentosa	Silver linden	20 - 30	40 - 50	deciduous	Leaves have silver undersides. Moderate growth rate, narrow crown. Showy, yellow flower in summer. Concerns around extreme heat tolerance and aphids.
Ulmus propinqua 'JFS-Bieberich' (Emerald Sunshine)	Emerald Sunshine elm	15 - 25	25 - 35	deciduous	Fast-growing upright tree. Deeply corrugated leaves emerge coppery-bronze and mature to glossy green. Insect resistant and tolerant of heat and drought, it is a fast-growing, tough and adaptable shade tree. Requires higher level of maintenance. Concerns around suckering from the base.
Zelkova serrata 'City Sprite'	City Sprite zelkova	15 - 18	20 - 25	deciduous	Very dense, semi-dwarf cultivar. Nice shade tree, one of the elm replacements post-DED. Concerns around branch strength & structure, heat & drought tolerance.
Zelkova serrata 'Musashino'	Musashino zelkova (columnar)	10 - 15	40 - 45	deciduous	Cultivar with very narrow growth habit. Concerns around branch strength & structure, heat & drought tolerance.

*Width - width of tree canopy **Height - height of tree at maturity

Large Trees

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Notes
Carya illinoinensis -	Pecan	70	70 - 100	deciduous	Very tall, fast-growing trees. Tolerance range includes drought and irrigated spaces. Needs early branch training. Concerns around aphids and reseeding.
Cedrus atlantica 'Glauca' -	Blue Atlas cedar	25 - 40	40 - 60	evergreen	Dense growth, classic pyramidal shape. Needles are silvery-blue. Potential for sapsucker damage.
Cedrus deodara -	Deodar cedar	20 - 30	40 - 60	evergreen	Graceful spreading habit with slightly weeping branches. Attractive blue-green color. Tough, reliable. Concerns around extreme heat tolerance.
Celtis australis -	European hackberry	40 - 50	40 - 70	deciduous	Tough tree. Tolerant of wind, heat, dry and alkaline soils. Somewhat upright growth habit. Concerns around reseeding and possible root damage.
Celtis occidentalis -	Common hackberry	40 - 50	45 - 80	deciduous	Tough tree. Tolerant of wind, heat, dry and alkaline soils. Round crown, spreading growth habit. Concerns around extreme heat tolerance, aphids, reseeding, and possible root damage.
Cinnamomum camphora -	Camphor	50 - 60	50 - 65	evergreen	New growth pink, ages to shiny yellow green. Aromatic leaves. Very tough and wind tolerant. Concerns around potential root damage.
Ginkgo biloba	Maidenhair tree	25	35 - 65	deciduous	Extremely adaptable tree with attractive leaves, excellent yellow fall color. Very low maintenance. Only plant male cultivars.
Ginkgo biloba 'Fairmount'	Fairmount ginkgo	12 - 25	50 - 75	deciduous	Male variety with narrow, upright growth habit. Concerns around extreme heat tolerance.
Ginkgo biloba 'Princeton Sentry'	Princeton Sentry ginkgo	15 - 20	40 - 65	deciduous	Male variety with very narrow, upright growth habit. Columnar shaped. Concerns around extreme heat tolerance.
Gymnocladus dioicus 'Espresso'	Espresso Kentucky coffee tree	25 - 35	40 - 50	deciduous	Podless variety. Concerns around extreme heat tolerance.
Liquidambar styraciflua	Sweet gum	40	80	deciduous	Upright growth habit and reliable fall color made these very popular for many years. Concerns around surface roots, produce spiky seed balls. ISHB lethal.
Morus alba 'Fruitless' -	Fruitless mulberrry	30 - 45	20 - 30	deciduous	Very popular in rural areas for fast growth and dense shade. Very tough, fast-growing species. Concerns around root damage, branch strength and susceptibility to borers.
Pinus canariensis -	Canary Island pine	20 - 35	50 - 80	evergreen	Large pine, heavily planted in Davis in the 60s-70s. Very upright growth habit, drooping needles. Drought tolerant. Concerns around pollen, sap and pine cones.
Pinus nigra	Austrian black pine	25 - 35	40 - 60	evergreen	Attractive classic pine tree form. Dark needles. Dense growth habit when young. Concerns around extreme heat tolerance.
Pinus sylvestris	Scotch pine	25 - 30	30 - 70	evergreen	Classic pine tree form, dense habit. Concerns around extreme heat and drought tolerance .
Platanus x acerifolia (syn. Platanus x hispanica)	London plane	50 - 70	70 - 85	deciduous	Extremely adaptable street tree. Big, fast growing, with high shade. Large portion of Davis' existing canopy ~10%. Concerns around extreme heat and drought tolerance. ISHB lethal.
Platanus x acerifolia 'Columbia'	Columbia London plane	30 - 40	50 - 80	deciduous	The most disease (anthracnose and mildew) resistant variety. Concerns around extreme heat tolerance. ISHB lethal.
Quercus kelloggii	California black oak	30 - 50	30 - 70	deciduous	Round crown. Attractive leaves are pinkish in spring, dark glossy green in summer, and yellow-orange in fall. Concerns around extreme drought tolerance.
Quercus lobata -	Valley oak	50	50 - 70	deciduous	Native, keystone species. Supports a plethora of wildlife. Makes up a large percentage of Davis' canopy. Drought tolerant. Concerns around extreme heat tolerance. Susceptible to MOB. ISHB can kill.
Quercus macrocarpa	Bur oak	30	60 - 80	deciduous	Fast growing, potentially very large oak. Large leaves, good branch structure. Interesting acorns. ISHB host.
Quercus palustris	Pin oak	30 - 40	50 - 70	deciduous	Pyramidal growth habit, then round with age. Glossy leaves. Marcescent. Concerns around extreme heat and drought tolerance.
Quercus rubra	Red oak	50 - 70	60 - 80	deciduous	Fast-growing, very large, straight trunk, tall, long-lived. Concerns around extreme drought tolerance.
Quercus shumardii	Shumard red oak	40	70	deciduous	Large lustrous leaves. Dense shade, good spread. Nice fall color. Fast growing. Concerns with sooty mold.
Quercus virginiana -	Southern live oak	60 - 100	40 - 80	semi-evergreen	Moderately fast growing, gets very large with considerable spread. Remarkably tough. Very adaptable to irrigation and drought.
Taxodium distichum	Bald cypress	25 - 35	60 - 80	deciduous	Soft green needles. Classic pyramidal growth habit. Interesting nut-brown fall color. Decidious conifer.
Taxodium distichum 'Mickelson' (Shawnee Brave)	Shawnee Brave bald cypress	15 - 20	50 - 75	deciduous	Variety selected for narrow, uniform growth habit. Decidious conifer.
Ulmus 'Morton' -	Accolade elm	25 - 40	50 - 60	deciduous	A top performer in the National Elm Trial. Shiny leaves are dark green. Nice vase-shaped growth habit. Yellow fall color. Resistant to elm leaf beetle. Slower growing, requires less maintenance.. Concerns around extreme heat tolerance and branch strength.
Ulmus 'Morton Glossy' -	Triumph elm	35 - 40	50 - 60	deciduous	A top performer in the National Elm Trial. Grows fast, requires high level of maintenance. Very symmetrical habit. Dark glossy green leaves. Possible resistant to elm leaf beetle. Concerns around extreme heat tolerance, elm leaf beetle and leaf browning issues.
Ulmus parvifolia 'Drake' -	Drake Chinese elm	35 - 50	35 - 45	semi-deciduous	Widely planted in California. Graceful arching, weeping habit. Very attractive bark. Has unique bark. Requires a high level of maintenance. Can defoliate during summer drought.
Zelkova serrata	Japanese Zelkova	50 - 65	50 - 65	deciduous	Widely planted sub for elms. Similar vase-shape growth habit. Fall color reddish-brown. Concerns around branch strength & structure, heat & drought tolerance.
Zelkova serrata 'Green Vase'	Green Vase zelkova	50 - 65	50 - 65	deciduous	Cultivar with narrower growth habit. Concerns around branch strength & structure, heat & drought tolerance.
Zelkova serrata 'Village Green'	Village Green Zelkova	45 - 50	50 - 60	deciduous	Most widely planted cultivar. Vigorous. Shiny green leaves, high branch structure. Rusty red fall color. Concerns around branch strength & structure, heat & drought tolerance.

*Width - width of tree canopy **Height - height of tree at maturity

Rare Trees

These trees meet the City's climate ready qualifications, but they may be very difficult to find at plant nurseries.

Scientific Name	Common Name	*Width (feet)	**Height (feet)	Type	Tree Size	Notes
Casuarina cunninghamiana -	River she-oak	30	70	evergreen	L	Extremely tough tree. Tolerant of dry or wet soil, salinity, heat, wind. Concerns around mess of color/fruit/flower litter and reseeding.
Ceratonia siliqua -	Carob tree	30 - 40	30 - 40	evergreen	M	Glossy leaves, dense crown. Extremely drought tolerant. Concerns around high litter (male - flowers, female - pods) and hard freeze tolerance.
Cercis griffithii -	Afghan redbud	12 - 15	15 - 20	deciduous	S	Tough species, similar to our native redbud. Showy, pink flower in spring. Smaller understory species, multi-trunk. Concern around extreme heat tolerance.
Cocculus laurifolius	Laurel-leaved snail tree	20 - 25	20 - 25	evergreen	S	Large, multi-trunk shrub with shiny dark green leaves can be trained as an elegant, arching small tree. ISHB host.
Cornus glabrata	Brown dogwood	5 - 15	5 - 15	deciduous	S	CA Native. Smaller understory species, multi-trunk, nice fall color. Can form thickets. Showy, white, red flower in spring. Stems can root. Concerns around extreme heat tolerance.
Crataegus phaenopyrum	Washington hawthorn	20 - 25	20 - 35	deciduous	S	Glossy leaves, upright growth habit. Showy white flowers in spring, showy red berries in winter. Less prone to fireblight than other hawthorns. Concerns around extreme heat tolerance.. UCD Arboretum Allstar.
Crinodendron patagua	Lily-of-the-valley tree	6 - 12	15 - 25	evergreen	S	Profusion of small, showy white flower blooms in summer. Concerns around extreme heat tolerance. UCD Arboretum Allstar.
Dermatophyllum secundiflorum -	Texas mountain laurel	10 - 15	15 - 25	evergreen	S	Showy blue, lavender, white sweet-scented flowers in late winter resemble wisteria. Concerns around seed toxicity.
Gymnocladus dioicus	Kentucky coffeetree	40 - 50	60 - 100	deciduous	L	Very tall tree with high, open shade. Very adaptable. Concerns around extreme heat tolerance and potential pod litter. Rec 'Expresso'
Juniperus chinensis -	Chinese juniper	20 - 25	20 - 60	evergreen	M	Cultivars are usually grown and more widely available.
Maclura pomifera 'White Shield' -	White Shield Osage orange	35	35	deciduous	M	Thornless male (fruitless) variety. Thick canopy. Vigorous. Tolerates heat, cold, wind, poor soil, alkalinity, wet or dry conditions. Concerns around root sprouting.
Melia azedarach -	Chinaberry	15 - 25	30 - 50	deciduous	M	Shiny green leaves, profuse lilac-colored fragrant flowers in spring and summer. Very tolerant of heat, wind, poor soil, drought. Concerns around fruit litter, reseeding, weak branch strength, and toxicity of berries.
Melia azedarach 'Elite' -	'Elite' chinaberry	15 - 20	30 - 40	deciduous	M	Fruitless variety. Showy, pink flowers in spring. Concerns around weak branch strength.
Melia azedarach 'Umbraculiformis' -	Texas umbrella tree	30 - 40	30 - 40	deciduous	M	Shiny compound leaves, dense canopy, interesting tight growth habit. Showy, pink, purple lavendar flower in spring, summer. Concerns around branch strength and fruit litter (toxic).
Pinus roxburghii	Chir pine	30 - 40	60 - 80	evergreen	L	Fast growth, upright habit, drooping needles. May go partially decidious during winter. Concerns around hard freeze damage and resin.
Pistacia chinensis 'Pearl Street' -	Pearl Street Chinese pistache	25 - 30	40 - 45	deciduous	M	Male variety. Good fall color. Concerns around winter flood tolerance.
Platanus racemosa 'Roberts' -	Roberts Western sycamore	35 - 40	45 - 50	deciduous	L	CA Native. Big leaves, beautiful bark open crown. Resistant to anthracnose. Concerns around extreme heat tolerance. ISHB lethal.
Prunus campanulata	Taiwan flowering cherry	25	25	deciduous	S	Very early flowering cherry with dark pink, nodding flower clusters. Concerns around drought tolerance.
Pterocarya stenoptera	Chinese wingnut	30 - 50	40 - 80	deciduous	L	Fast-growing tree with wide-spreading limbs. Tolerant of compacted soil, good for high traffic areas. ISHB host.
Quercus castaneifolia	Chestnut leaf oak	30 - 90	30 - 90	semi-deciduous	L	Very large tree. Interesting narrow leaves. Can be marcescent. Concerns around extreme heat tolerance.
Styphnolobium japonicum -	Japanese pagoda	40 - 70	40 - 70	deciduous	L	Showy, white flower in summer. Concerns around messy pods.
Taxus baccata	English yew	15 - 25	25 - 50	evergreen	M	Not commonly planted. Slow growing. Concerns with extreme heat tolerance and berry toxicity. See cultivar: 'Fastigiata'
Ulmus parvifolia -	Lacebark Elm	50 - 70	40 - 60	semi-deciduous	L	Fast-growing with variable growth habit but generally weeping. Bark patterns are very attractive. Very heat tolerant. Concerns around over-extending branches and reseeding.
Ulmus parvifolia ‘Emer I’ (Athena) -	Athena Chinese elm	40 - 50	35 - 45	semi-deciduous	M	Fast grower with considerable spread. Concerns around reseeding.
Ulmus parvifolia 'Allee' -	Allee Chinese elm	35 - 55	60 - 70	semi-deciduous	L	Fast grower with upright growth and vase-shaped habit. Concerns around reseeding.
Umbellularia californica -	California bay	60 - 75	60 - 75	evergreen	L	CA Native, distinct California scent. Aromatic leaves and flowers. Oils in leaf can be mildy toxic. Concerns around extreme heat tolerance, phytophthora and SOD.