Acer x freemanii ‘Autumn Blaze’ (Autumn Blaze Maple): 60'H x 40'+W. Fast-growing, with dense oval upright crown; red twigs, branches, and buds; showy flowers; dull red fruit; and brilliant orange-red fall color. Not very pollution tolerant.

Acer negundo 'Sensation' (Sensation Box Elder): 40'H x 30'W. Nonsuckering variety with toothed 3-9 lobed leaves, slowish growth and lovely deep pink fall foliage.

Acer tataricum ginnala 'Flame' (Flame Amur Maple): 15-20' H&W. Toothed, three-lobed leaves; fragrant yellowish early spring flowers; bright red winged seeds; fiery autumn red foliage. Native to Manchuria, China, Japan.

Catalpa speciosa (Native Catalpa): 40-60'H x 20-40'W. Round-headed tree, native to Southwestern U.S., with large 6-12" long heart-shaped odorless leaves; clusters of 2"-wide white trumpets marked and striped yellow and soft brown in late spring and early summer, followed by "Indian beans", i.e., long bean-shaped seed capsules. Highly adaptable to Southwest conditions.

Celtis occidentalis (Common Hackberry): 50'H x 40'W. Rounded crown, spreading branches; bright green finely toothed oval leaves which do not appear until mid-spring. Brown berrylike fruits attract wildlife. Resists oak root fungus. A tough, adaptable shade tree.

Crataegus phaenopyrum (Washington Hawthorn, syn. Crataegus cordata): 25'H x 20'W. Graceful little tree with glossy lobed leaves that turn shades of red and orange in fall. Showy, shiny red fruit in fall and winter. Native to Southeast U.S.A. Resists fireblight.

Fraxinus americana ‘Autumn Purple’ (Autumn Purple Ash): 40-60’ H, 40-50’ W, drought-tolerant, upright, oval tree with striking purplish-red fall color. Seedless.

Fraxinus pennsylvanica ‘Marshall’ (Marshall Ash): 30-40’+ H&W. Fast-growing tree with compact oval crown. 10-12" long narrowish compound leaves. Leaves turn gold in fall. Seedless. Can tolerate drought once well-established, but does best with regular water. Protect from hot dry winds.

Fraxinus pennsylvanica ‘Patmore’ (Patmore Ash): 30-40’+ H&W. Fast-growing tree with compact oval crown. 10-12" long narrowish compound leaves. Leaves turn gold in fall. Seedless. Can tolerate drought once well-established, but does best with regular water. Protect from hot dry winds. This variety is particularly cold-tolerant.

Fraxinus pennsylvanica ‘Urbanite’ (Urbanite Ash): 30-40’+ H&W. Fast-growing tree with striking pyramidal shape. 10-12" long narrowish compound leaves. Leaves turn bronze in fall. Seedless. Can tolerate drought once well-established, but does best with regular water. Protect from hot dry winds. 

Gleditsia triacanthos inermis ‘'Imperial’ (Imperial Thornless Honeylocust): 35’ H, 30-40’ W, drought-tolerant, fast-growing, graceful tree with spreading branches eventually forming a rounded crown and denser than usual foliage cover. Soft yellow fall color. Thornless and seedless.

Gleditsia triacanthos inermis ‘Shademaster’ (Shademaster Thornless Honeylocust): 40-50’ H, 30-40’ W, drought-tolerant, fast-growing, graceful tree with thornless, spreading branches forming a rounded crown. Soft- yellow fall color. Seedless.

Gleditsia triacanthos inermis ‘Sunburst’ (Sunburst Thornless Honeylocust): 40-50’ H, 30-40’ W, drought-tolerant, fast-growing, graceful tree with spreading branches eventually forming a rounded crown and denser than usual foliage cover. New foliage is golden yellow; yellow fall color. Thornless and seedless.

Koelreuteria paniculata (Goldenrain Tree): 20-35’ H x 25-40’ W. Open, branching ornamental with compound leaves that open purplish and mature to bright green. Showy 8-14" long golden flower clusters in summer, followed by decorative, winter-persistent, Chinese-lantern-like reddish fruit capsules that mature to buff-brown. Tolerant of temperature extremes and drought.

Malus ‘Radiant’ (Radiant Hybrid Crabapple): 20-25’H, 15-20’W, drought-tolerant, densely-rounded tree. Deep red buds open to deep pink flowers in spring producing bright red fruits in summer. Bronze-green foliage through fall.

Pinus flexilis ‘Vanderwolf’ (Vanderwolf Limber Pine): 30-50’ H, 15-30’ W, adaptable water requirements, sun to filtered shade. Striking, bluish-green needles on ascending branches form an upright, pyramidal tree. Needles are soft and flexible.

Pinus nigra (Austrian Pine): 40-60’H, 30-40’ W, drought-tolerant, broad growing, pyramidal to oval tree. Wide-spreading branches have long, shiny green needles. It is pest and disease resistant to our local ‘problems’, so it is a great replacement for Pinus ponderosa ‘Ponderosa Pine’.

Pinus sylvestris (Scots Pine): 30-50’ H, 20-30’ W, adaptable water requirements, sun to filtered shade. Distinctive, heavily plated, yellowish-orange bark and layered branches create an interesting, round to conical shaped tree. Short needles are blue-green. This tree is pest and disease resistant to our local ‘problems’, so it is an excellent alternative to Pinus edulis ‘Pinon Pine’.

Populus x acuminata (Lanceleaf Cottonwood): 40-60’ H x 35-45’ W. Seedless male hybrid with narrow triangular dark green leaves, paler green underneath, which turn yellow in fall. Vigorous root systems. Prefers full sun and regular water.

Populus angustifolia (Narrowleaf Poplar): 50-60’ H x 35-45’ W. Rocky Mountain native with finely toothed, slender, 5" long green leaves. Bark is greenish when young. Vigorous root systems. Prefers full sun and regular water.

Prunus cerasifera ‘Krauter Vesuvius’ (Krauter Vesuvius Plum): 15-20’ H, 15-20’ W, drought-tolerant, rounded tree with dark, coppery leaves. Flowers in spring are light pinks to white and sometimes set a good crop of delicious, red fruit.

Prunus cerasifera ‘Thundercloud’ (Thundercloud Plum): 15-20’ H, 15-20’ W, drought-tolerant, rounded tree with dark, coppery leaves. Flowers in spring are light pinks to white and sometimes set a good crop of delicious, red fruit.

Pyrus calleryana ‘Aristocrat’ (Aristocrat Ornamental Pear): 35-40’ H x 20’ W. Open, upward-curving branches form attractive loose pyramid; dark green leaves turn yellow to red in fall. Tolerant of heavy clay.

Pyrus calleryana ‘Capital’ (Capital Ornamental Pear): 40’ H x 15’ W. Columnar tree with dark green leaves that turn coppery-red in fall. Tolerant of heavy clay.

Pyrus calleryana ‘Chanticleer’ (Chanticleer Ornamental Pear; aka "Cleveland Select", "Stone Hill"): 40’ H x 15’ W. Pyramidal to columnar tree with dark green leaves that turn orange to reddish-purple in fall. Tolerant of heavy clay.

Robinia ambigua ‘Purple Robe’ (Purple Robe Locust): 35-45’ H, 25-30’ W, drought-tolerant, compact, rounded tree bearing dark purple, fragrant flowers in May-June.

Sophora japonica ‘Regent’ (Regent Japanese Pagoda Tree): 50-70’ H&W. Wonderful shade tree with dark grey-green bark that ages to attractive furrows; dark green divided leaves. Showy, drooping clusters of whitish sweetpea-like blossoms in spring, followed by decorative 4-7" seedpods. Needs good drainage. Hardy to Zone 4.

Tilia cordata ‘Greenspire’ (Greenspire Little-leaf Linden): 30-40’ H, 25-35’ W, drought-tolerant, uniform conical shaped tree with small round to heart-shaped green leaves turning to yellow in fall. Tiny, pale yellow flowers in summer are fragrant.

Ulmus ‘Accolade’ (Accolade Hybrid Japanese Elm): 40'H x 30'W. Wonderful substitute for the American elm, 'Accolade' is resistant to Dutch elm disease. Arching, vaselike form; highly adaptable to different soils and moisture levels. Hardy to Zone 4.

Ulmus ‘Frontier’ (Frontier Hybrid ChineseElm): 40'H x 30'W. Resistant to Dutch elm disease. Glossy green leaves; purplish-red fall color. Hardy to Zone 4.