List of Trees in this Key

Acer spp. — Maples
- Acer ginnala — Amur Maple
- Acer glabrum — Rocky Mountain Maple
- Acer grandidentatum — Big Tooth Maple
- Acer negundo — Boxelder
- Acer platanoides — Norway Maple
- Acer rubrum — Red Maple
- Acer saccharinum — Silver Maple
- Acer saccharum — Sugar Maple
- Acer tataricum — Tartarian Maple
Aesculus spp. — Buckeye, Horsechestnut
- Aesculus glabra — Ohio Buckeye
- Aesculus hippocastanum — Horsechestnut
Ailanthus altissima — Tree of Heaven
Alder, Thinleaf — Alnus tenufolia
Alnus tenufolia — Thinleaf Alder
Apple — Malus pumila
Apricot — Prunus armeniaca
Ash — Fraxinus spp.
- Autumn Purple White Ash— Fraxinus americana ‘Autumn Purple’
- Green Ash — Fraxinus pennsylvanica
- White (Autumn Purple) Ash — Fraxinus americana ‘Autumn Purple’
Aspen, Quacking — Populus tremuloides
Birch — Betula spp.
Betula spp. — Birch
Boxelder — Acer negundo
Buckeye, Ohio — Aesculus glabra
Buckthorn, Common — Rhamnus cathartica
Catalpa, Northern — Catalpa speciosa
Catalpa speciosa — Northern Catalpa
Celtis occidentalis — Common Hackberry
Cercis canadensis — Eastern Redbud
Cherry — Prunus spp.
- Cherry, Sour — Prunus cerasum
- Cherry, Sweet — Prunus avium
Chokecherry — Prunus spp.
- Amur Chokecherry — Prunus maacki
- Canada Red Chokecherry — Prunus virginiana ‘Schubert’
- Common Chokecherry — Prunus virginiana
Cottonwood — Populus spp.
- Lanceleaf Cottonwood — Populus acuminata
- Narrowleaf Cottonwood — Populus angustifolia
- Plains Cottonwood — Populus sargentii
Crabapple — Malus spp.
Crataegus spp. — Hawthorn
Elaeagnus angustifolia — Russian Olive
Elm — Ulmus spp.
- American Elm — Ulmus americana
- Siberian Elm — Ulmus pumila
Euonymus spp.
- Euonymus atropurpureus — Eastern Wahoo
- Euonymus europaeus — Common Spindle Tree
Fraxinus — Ash
- F. american ‘Autumn Purple’ — Autumn Purple White Ash
- F. pennsylvanica — Green Ash
Ginkgo — Ginkgo biloba
Ginkgo biloba — Ginkgo
Gleditsia triacanthos var. inermis — Thornless Honeylocust
Goldenrain Tree — Koelreuteria paniculata
Gymnocladus dioicus — Kentucky Coffeetree
Hackberry — Celtis occidentalis
Hawthorn — Crataegus spp.
Honeylocust, Thornless — Gleditsia triacanthos var. inermis
Hop Tree — Ptelea trifoliata
Horsechestnut — Aesculus hippocastanum
Japanese Pagoda Tree — Sophora japnoica
Japanese Tree Lilac — Syringa reticulata
Juglans nigra — Black Walnut
Kentucky Coffeetree — Gymnocladus dioicus
Koelreuteria paniculata — Goldenrain Tree
Linden — Tilia spp.
Locust, Black — Robinia pseudoacacia
Malus spp. — Apples, Crabapples
- Malus pumila — Apple
Maple — Acer spp.
- Amur Maple — Acer ginnala
- Big Tooth Maple — Acer grandidentatum
- Norway Maple — Acer platanoides
- Red Maple — Acer rubrum
- Rocky Mountain Maple — Acer glabrum
- Silver Maple — Acer saccharinum
- Sugar Maple — Acer saccharum
- Tatarian Maple — Acer tataricum
Morus alba — White Mulberry
Mountain Ash, European — Sorbus aucuparia
Mulberry, White — Morus alba
Oak — Quercus spp.
- Bur Oak — Quercus macrocarpa
- English Oak — Quercus robur
- Pin Oak — Quercus palustris
- Red Oak — Quercus rubra
- Scrub Oak — Quercus gambelii
- Swamp White Oak — Quercus bicolor
Ohio Buckeye — Aesculus glabra
Peach — Prunus persica
Pear — Pyrus communis
Planetree, London — Platanus x acerifolia
Platanus spp. — Sycamore, London Planetree
- Platanus occidentalis — American Sycamore
- Platanus x acerifolia — London Planetree
Plum — Prunus spp.
- American Plum — Prunus americana
- Blireana Plum — Prunus x blireana
- Domestic Plum — Prunus domestica
- Newport Plum — Prunus cerasifera ‘Newport’
Poplar — Populus spp.
- Lombardy Poplar — Populus nigra ‘Italica’
- White Poplar — Populus alba
Populus spp. — Cottonwoods, Poplars, Aspen
- Populus acuminata — Lanceleaf Cottonwood
- Populus alba — White Poplar
- Populus angustifolia — Narrowleaf Cottonwood
- Populus nigra ‘Italica’ — Lombardy Poplar
- Populus sargentii — Plains Cottonwood
- Populus tremuloides — Quacking Aspen
Prunus spp.
- Prunus americana — American Plum
- Prunus armeniaca — Apricot
- Prunus avium — Sweet Cherry
- Prunus cerasifera ‘Newport’ — Newport Plum
- Prunus cerasus — Sour Cherry
- Prunus domestica — Domestic Plum
- Prunus maacki — Amur Chokecherry
- Prunus persica — Peach
- Prunus virginiana — Common Chokecherry
- Prunus virginiana ‘Schubert’ — Canada Red Chokecherry
- Prunus x blireana — Blireana Plum
Ptelea trifoliata — Hop Tree
Russian Olive — Elaeagnus angustifolia
Pyrus communis — Pear
Quercus spp. — Oak
- Quercus bicolor — Swamp White Oak
- Quercus gambelii — Scrub Oak
- Quercus macrocarpa — Bur Oak
- Quercus palustris — Pin Oak
- Quercus robur — English Oak
- Quercus rubra — Red Oak
Redbud, Eastern — Cercis canadensis
Rhamnus cathartica — Common Buckthorn
Rhus typhina —Staghorn Sumac
Robinia pseudoacacia — Black Locust
Salix spp. — Willows
- Salix amygdaloides — Peachleaf Willow
- Salix babylonica — Weeping Willow
Salt Cedar — Tamarix hispida
Sophora japonica — Japanses Pagoda Tree
Sorbus aucuparia — European Mountain Ash
Spindle Tree, Common — Euonymus europaeus
Sumac, Staghorn — Rhus typhina
Sycamore, American — Platanus occidentalis
Syringa reticulata — Japanese Tree Lilac
Tamarix hispida — Salt Cedar
Tilia spp. — Linden
Tree of Heaven — Ailanthus altissima
Ulmus spp. — Elm
- Ulums americana — American Elm
- Ulmus pumila — Siberian Elm
Wahoo, Eastern — Euonymus atropurpureus
Walnut, Black — Juglans nigra
Willow — Salix spp.
- Peachleaf Willow —Salix amygdaloides
- Weeping Willow — Salix babylonica

Resources

Identifying Broadleaf Flowering Trees and Shrubs, CMG GardenNotes #173
Index of trees in this key
Glossary of Terms
Front Range Tree Recommendation List
CSU Extension publications on Tree and Shrub Selection

September 2013

Colorado State University

Extension

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