Trees of the Southwestern United States

Dodonaea viscosa is a species of flowering plant in the soapberry family, Sapindaceae, that has a cosmopolitan distribution in tropical, subtropical and warm temperate regions of Africa, the Americas, southern Asia and Australasia.

Abies procera, the noble fir, also called red fir and Christmastree, is a western North American fir, native to the Cascade Range and Coast Range mountains of extreme northwest California and western Oregon and Washington in the United States.

Frangula betulifolia, the birchleaf buckthorn, is a shrub or small tree in the buckthorn family, Rhamnaceae.

Rhus virens is a species of flowering plant in the mango family, Anacardiaceae, that is native to Arizona, southern New Mexico, and Texas in the United States as well as northern and central Mexico as far south as Oaxaca.

Rhus microphylla, the littleleaf sumac, desert sumac, correosa, or agritos, is a species of sumac in the family Anacardiaceae, native to North America, in the southwestern United States and northern and central Mexico, from central and western Texas, southern New Mexico, central and northern regions of the Mexican Altiplano-(Mexican Plateau), and extreme southeastern Arizona of the Madrean Sky Islands.

Rhus ovata, also known as sugar sumac or sugar bush, is an evergreen shrub to small tree that grows in chaparral in dry canyons and south-facing slopes below 1300 m in Southern California, Arizona and Baja California.

Torreya californica is species of conifer endemic to California, occurring in the Pacific Coast Ranges and the foothills of the Sierra Nevada.

Juglans major (literally, the larger walnut) is a walnut tree which grows to 50 ft tall (15 m) with a DBH of up to 2 feet (0.61 m) at elevations of 1000–7000 ft in Texas, Oklahoma, New Mexico, Arizona, and Utah.

Populus fremontii, Fremont's cottonwood or the Alamo cottonwood, is a cottonwood (and thus a poplar) native to riparian zones of the Southwestern United States and northern through central Mexico.

Prosopis velutina, commonly known as velvet mesquite, is a small to medium-sized perennial tree.

Cupressus arizonica var.

Quercus turbinella is a North American species of oak known by the common names Sonoran scrub oak, shrub live oak, and grey oak.

Prosopis glandulosa, commonly known as honey mesquite, is a species of small to medium-sized, thorny shrub or tree in the legume family (Fabaceae).

Senegalia greggii is a species of Senegalia native to the southwestern United States and northern Mexico, from the extreme south of Utah (where, at 37°10' N it is the northernmost naturally occurring Senegalia species anywhere in the world) south through southern Nevada, southeast California, Arizona, New Mexico and western Texas to Baja California, Sinaloa and Nuevo León in Mexico.

Salix laevigata (red willow or polished willow), is a species of willow native to the southwestern United States and northern Baja California.

Parkinsonia microphylla, the yellow paloverde, foothill paloverde or little-leaved palo verde; syn.

Cupressus stephensonii is a species of conifer known as the Cuyamaca cypress, and endemic to California.

Aesculus californica, California buckeye or California horse-chestnut, is a species of buckeye native to California and southwestern Oregon.

Eysenhardtia texana, commonly known as Texas kidneywood, bee-brush, or vara dulce, is a species of small flowering tree in the legume family, Fabaceae.

Eysenhardtia orthocarpa is a species of small flowering tree, (a kidneywood) in the legume family, Fabaceae.

Ptelea trifoliata, the common hoptree, stinking ash or wafer ash, is a species of flowering plant in the Rutaceae family, native to North and Central America.

Pinus engelmannii, commonly known as the Apache pine, is a tree of Northern Mexico, in the Sierra Madre Occidental with its range extending a short distance into the United States in southwestern New Mexico and southeastern Arizona.

Chrysolepis is a small genus in the beech family Fagaceae, endemic to the western United States.

Quercus lobata, commonly called the valley oak or roble, grows into the largest of North American oaks.

Populus angustifolia is a species of poplar tree known by the common names narrowleaf cottonwood and willow-leaved poplar.

Parkinsonia florida, the blue palo verde (syn. Cercidium floridum), is a species of palo verde native to the Sonoran Deserts in the Southwestern United States and Northwestern Mexico.

Quercus tomentella, the island oak, island live oak, or Channel Island oak, is an oak in the section Protobalanus.

Quercus emoryi, the Emory oak, is a species of oak common in Arizona (including inside Saguaro National Park), New Mexico and western Texas (including inside Big Bend National Park), United States, and northern Mexico (Sonora, Chihuahua, Coahuila (including Parque Nacional Maderas del Carmen), Durango, Nuevo León, and San Luis Potosí).

Pinus leiophylla, commonly known as Chihuahua pine, smooth-leaf pine, and yellow pine (in Mexico, tlacocote and ocote chino), is a tree with a range primarily in Mexico, with a small extension into the United States in southeast Arizona and southwest New Mexico.

Parkinsonia aculeata is a species of perennial flowering tree in the pea family, Fabaceae.

Pinus johannis, the Johann's pine, is a pine in the pinyon pine group, native to North America.

Pinus cembroides, also known as pinyon pine, Mexican pinyon, Mexican nut pine, and Mexican stone pine, is a pine in the pinyon pine group, native to western North America.

Pinus quadrifolia, the Parry pinyon, is a pine in the pinyon pine group native to southernmost California in the United States and northern Baja California in Mexico, from 33° 30' N south to 30° 30' N.

Cupressus bakeri, reclassified as Hesperocyparis bakeri, with the common names Baker cypress, Modoc cypress, or Siskiyou cypress, is a rare species of cypress tree endemic to a small area across far northern California and extreme southwestern Oregon, in the western United States.

Abies bracteata, the bristlecone fir or Santa Lucia fir, is a rare fir, confined to slopes and the bottoms of rocky canyons in the Santa Lucia Mountains on the central coast of California, United States.

Cupressus macnabiana (MacNab cypress or Shasta cypress) is a species of cypress in western North America.

Fraxinus anomala is a species of ash tree known by the common name single-leaf ash.

Populus trichocarpa, the black cottonwood, western balsam-poplar or California poplar, is a deciduous broadleaf tree species native to western North America.

Sequoia is a genus of redwood coniferous trees in the subfamily Sequoioideae of the family Cupressaceae.

Western white pine (Pinus monticola) also called silver pine, and California mountain pine, in the family Pinaceae, is a species of pine that occurs in the mountains of the western United States and Canada, specifically the Sierra Nevada, the Cascade Range, the Coast Range, and the northern Rocky Mountains.

Quercus havardii (common names include shinnery oak, shin oak and Havard oak) is a deciduous, low-growing, thicket-forming shrub that occupies some 2 to 3 million hectares in the southern Great Plains of North America.

Quercus hypoleucoides, the silverleaf oak or the whiteleaf oak is a North American species of trees or shrubs in the beech family.

Quercus grisea, commonly known as the gray oak, shin oak or scrub oak, is a North American species deciduous or evergreen shrub or medium-sized tree in the white oak group.

Fraxinus dipetala (California ash or two-petal ash) is a species of ash native to southwestern North America in the United States in northwestern Arizona, California, southern Nevada, and Utah, and in Mexico in northern Baja California.

Quercus × macdonaldii, formerly Quercus macdonaldii, with the common names MacDonald's oak and Macdonald oak, is a rare species of oak in the Fagaceae family.

The Ancient Bristlecone Pine Forest is a protected area high in the White Mountains in Inyo County in eastern California.

Cupressus forbesii, now reclassified by some as Hesperocyparis forbesii, and with the common names Tecate cypress or Forbes' cypress, is a species of cypress native to southwestern North America.

Cupressus abramsiana (Santa Cruz cypress) is a rare North American species of trees in the cypress family.

Cupressus nevadensis, now reclassified as 'Hesperocyparis nevadensis, with the common name Paiute cypress, is a species of cypress tree native to a small area in Sierra Nevada of California, in the western United States.

Cupressus pigmaea (Mendocino cypress or pygmy cypress) is a taxon of disputed status in the genus Cupressus endemic to certain coastal terraces and coastal mountain ranges of Mendocino and Sonoma Counties in northwestern California.

Prosopis pubescens, commonly known as screwbean mesquite, is a species of flowering shrub or small tree in the pea family, Fabaceae, that is native to the southwestern United States (Texas, Arizona, New Mexico, California, southern Nevada and Utah) and northern Mexico (Baja California, Chihuahua, Coahuila, Sonora).

Pseudotsuga menziesii var.

Psorothamnus spinosus, known as the smokethorn, smoketree, smoke tree, smokethorn dalea, and corona de Cristo, is a perennial legume tree of the deserts in North America.

Ptelea crenulata, commonly known as the California hoptree, is a species of tree that is endemic to the state of California in the United States.

Sideroxylon lanuginosum is a shrub or small tree of the family Sapotaceae.

Fraxinus latifolia (Oregon ash) is a member of the ash genus Fraxinus, native to western North America.

Washingtonia filifera, also known as desert fan palm or California fan palm or California palm, is a flowering plant in the palm family (Arecaceae), and native to the southwestern U.

Ziziphus obtusifolia is a species of flowering plant in the buckthorn family known by several common names, including lotebush, graythorn, gumdrop tree, and Texas buckthorn.

Alnus oblongifolia (Arizona alder) is a large alder, birch-family tree up to 72 feet (22 m), from the southwestern United States and northern Sonora, Mexico.

Cupressus sargentii is a species of conifer in the Cupressaceae family known by the common name Sargent's cypress.

Olneya tesota is a perennial flowering tree of the Fabaceae family, legumes (peas, beans, etc.), which is commonly known as ironwood or desert ironwood.

Quercus rugosa, commonly known as the netleaf oak, is a broad-leaved tree in the beech and oak family Fagaceae.

Quercus oblongifolia, commonly known as the Mexican blue oak or Sonoran blue oak, is an evergreen small tree or large shrub in the white oak group.

Condalia globosa, also called Bitter Condalia, or Bitter Snakewood, is a perennial shrub, small tree of the Rhamnaceae family.

Quercus arizonica, the Arizona white oak, is North American species of trees in the beech family.

Salix taxifolia (yewleaf or yew-leaf willow) is a species of willow native to all of southern Mexico, also Pacific Coast regions, north to Sinaloa, and in the south Pacific Coast of Mexico into central Guatemala.

Salix bonplandiana (Bonpland willow), (Span.: ahuejote, sauce, ahujote, and huejote), is a perennial species of willow tree native to southern and southwest Mexico and extending into central Guatemala; in western Mexico it is a tree of the Sierra Madre Occidental cordillera, but also occurring in other small locales, for example Baja California Sur, northern Sonora, San Luis Potosi, etc.

The Eddy Arboretum is located at the Institute of Forest Genetics in the Sierra Nevada near Placerville, in El Dorado County, eastern California.

Arbutus arizonica, commonly known as Arizona madrone, is a tree species in the heath family family that is native to the southwestern United States and northwestern Mexico.