John Torrey

Darlingtonia californica is a species of carnivorous plant in the new world pitcher plant family, Sarraceniaceae. The cobra lily is the sole species within its monotypic genus, Darlingtonia. The cobra lily is native to Northern California and Oregon, in the western United States, where the climate—while typically thought of as cool and humid—may be quite arid for many months of the year, more so than many carnivorous or pitcher plant genera could feasibly survive (such as Heliamphora, Nepenthes or Sarracenia). However, the cobra lily has evolved into life along the West Coast and in the lower

Pinus monophylla, the single-leaf pinyon, (alternatively spelled piñon) is a pine in the pinyon pine group, native to North America. The range is in southernmost Idaho, western Utah, Arizona, southwest New Mexico, Nevada, eastern and southern California and northern Baja California. It occurs at moderate altitudes from 1,200 to 2,300 m (3,900 to 7,500 ft), rarely as low as 950 m (3,120 ft) and as high as 2,900 m (9,500 ft). It is widespread and often abundant in this region, forming extensive open woodlands, often mixed with junipers in the Pinyon-juniper woodland plant community. Single-leaf

Torreya californica is a species of conifer endemic to California, occurring in the Pacific Coast Ranges and the foothills of the Sierra Nevada. It is commonly known as California torreya or California nutmeg tree (although not closely related to true nutmeg). It is one of only two species of genus Torreya that are native to North America. A slow-growing (but long-lived) subcanopy tree, it is listed as "vulnerable" in the IUCN Red List.

Yucca baccata (datil yucca or banana yucca, also known as Spanish bayonet and broadleaf yucca) is a common species of yucca native to the deserts of the Southwestern United States and three states in Northern Mexico. The species gets its common name "banana yucca" from its banana-shaped fruit. The specific epithet baccata means 'with berries'. Banana yucca is closely related to the Yucca schidigera, the Mojave yucca, with which it is interspersed where their ranges overlap; hybrids between them occur.

Acer glabrum is a species of maple native to western North America, from southeastern Alaska, British Columbia and western Alberta, east to western Nebraska, and south through Washington, Oregon, Idaho, Montana and Colorado to California, Arizona, Utah, and New Mexico.

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

Fraxinus velutina, the velvet ash, Arizona ash or Modesto ash, is a species of Fraxinus native to southwestern North America, in the United States from southern California east to Texas, and in Mexico from northern Baja California east to Coahuila and Nuevo León.

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Coleogyne ramosissima or blackbrush, is a low lying, dark grayish-green, aromatic, spiny, perennial, soft wooded shrub, native to the deserts of the southwestern United States. It is called blackbrush because the gray branches darken when wet by rains. It is in the rose family (Rosaceae) and is monotypic (the only species in its genus).

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). It typically grows in dry hills at moderate altitudes.

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

Echinocystis is a monotypic genus in the gourd family, Cucurbitaceae. The sole species is E. lobata, commonly called wild cucumber and prickly cucumber. It is an annual, sprawling plant that is native to North America. Sicyos angulatus, common name "bur cucumber", is an annual plant with a similar clinging vine growth but different-appearing flowers and seed pods.

Aplectrum hyemale is a species of orchid native to the eastern United States and Canada, from Oklahoma east to the Carolinas and north to Minnesota, Ontario, Quebec and Massachusetts. It is particularly common in the Appalachian Mountains, the Great Lakes Region, and the Ohio and Upper Mississippi Valleys. Isolated populations are also reported from Arizona. Aplectrum hyemale is the sole species of the genus Aplectrum. The generic name comes from Greek and signifies "spurless". The species is commonly referred to as Adam and Eve or putty root; the latter refers to the mucilaginous fluid which

Cornus nuttallii, the Pacific dogwood, western dogwood, or mountain dogwood, is a species of dogwood native to western North America. The tree's name used by Hul'q'umi'num'-speaking nations is Kwi’txulhp.

Asclepias speciosa is a milky-sapped perennial plant in the dogbane family (Apocynaceae), known commonly as the showy milkweed and is found in the western half of North America.

Artemisia filifolia, known by common names including sand sagebrush, sand sage and sandhill sage, is a species of flowering plant in the aster family. It is native to North America, where it occurs from Nevada east to South Dakota and from there south to Arizona, Chihuahua, and Texas.

Agave parviflora is a species of succulent perennial flowering plant in the asparagus family, known by the common names Santa Cruz striped agave, smallflower century plant, and small-flower agave. It is native to Arizona in the United States and Sonora in Mexico.

Agave lechuguilla (common name in Chihuahua: lechuguilla, meaning "small lettuce") is an Agave species found only in the Chihuahuan Desert. The plant flowers once in its life and then dies.

Sarcodes is a monotypic genus of flowering plants in the heath family (Ericaceae) native to northwest North America, containing the single species Sarcodes sanguinea, commonly called the snow plant or snow flower. It is a parasitic plant that derives sustenance and nutrients from mycorrhizal fungi that attach to tree roots. Lacking chlorophyll, it is unable to photosynthesize. Ectomycorrhizal (EM) symbioses involve a mutualism between a plant root and a fungus; the plant provides fixed carbon to the fungus and in return, the fungus provides mineral nutrients, water, and protection from

Rubus leucodermis, also called whitebark raspberry, blackcap raspberry, blue raspberry, or Chkohpeen by the Yurok is a species of Rubus native to western North America. Despite its name, it has no connection to the artificial flavoring known as blue raspberry.

Helianthella, the little sunflower, is a genus of North American plants in the family Asteraceae. Species Helianthella californica A.Gray - California, Nevada, Oregon Helianthella castanea Greene - San Francisco Bay region Helianthella ciliata S.F.Blake - Chihuahua Helianthella durangensis B.L.Turner - Durango Helianthella gypsophila B.L.Turner - Nuevo León, Coahuila Helianthella mexicana A.Gray - San Luis Potosí, Zacatecas, etc. Helianthella microcephala (A.Gray) A.Gray - Arizona, New Mexico, Colorado, Utah Helianthella parryi A.Gray - Arizona, New Mexico, Colorado, Utah Helianthella

Euphorbia albomarginata (formerly Chamaesyce albomarginata), whitemargin sandmat or rattlesnake weed, is a small low-growing perennial, in the spurge family (Euphorbia, Euphorbiaceae) native to desert, chaparral, and grassland habitats of southwestern North America, from southern and central California to Northern Mexico and Louisiana. It can be easily identified by its small size, dusty green leaves, very flattened growth pattern, and the white circular margin around the edge of its burgundy centered flowers. It is one of four members of the former Chamaesyce genus that are native to the

Rhododendron canadense, the rhodora or Canada rosebay, is a deciduous flowering shrub that is native to northeastern North America.

Crataegus aestivalis, known as the eastern mayhaw, is a shrub or small tree of the southeastern United States that grows in low-lying or wet areas from eastern Alabama to central Florida and Virginia. It is one of several species of hawthorn with fruits known as "mayhaws", which are harvested for use in making mayhaw jelly, considered a delicacy in many areas of the South. Other species of mayhaws include Crataegus opaca, the western May Hawthorn, which is native from east Texas to Alabama. The jelly is a rosy color, with a delicate flavor. It's sometimes commercially available at farm stands

Arctomecon is a genus of the poppy family Papaveraceae commonly called the bear poppies or bear-paw poppies, after the distinctive appearance of the leaves. The three species occur only in the northeastern part of the Mojave Desert of North America, and are all uncommon. The plants consist of one or a cluster of basal rosettes of leaves with a generally light blue or grey appearance. Closer examination shows the leaves to be generally wedge-shaped, with the end of each divided into several teeth, and entirely covered with long hairs 5–15 mm in length. The effect is that of a hairy bear paw,

Scoliopus, or fetid adderstongue, is a genus of plant within the family Liliaceae consisting of two species, Scoliopus bigelovii and S. hallii. Both are found in deep shaded forests, primarily in the coastal counties of the western United States from central California to northern Oregon. The name "Scoliopus" derives from the Greek words skolios and pous, meaning curved foot, a reference to the shape of the pedicel. Taxonomists believe that Scoliopus is closely related to Calochortus, Prosartes, Streptopus and Tricyrtis, which all have creeping rhizomes as well as styles that divide at the

Rubus deliciosus is a North American species of flowering plant in the rose family Rosaceae, native to the United States. Common names include the delicious raspberry, boulder raspberry, Rocky Mountain raspberry or snowy bramble.

Lithophragma is a genus of flowering plants in the saxifrage family containing about nine species native to western North America. These plants are known generally as woodland stars. The petals of the flowers are usually bright white with deep, long lobes or teeth. Each petal may look like three to five petals, when at closer inspection the lobes fuse into a single petal at its base. Most species reproduce via bulblets instead of seeds. L. maximum is a federally listed endangered species. Lithophragma specifically coevolved with moths of the genus Greya, who pollinate and only lay eggs on

Lemna perpusilla, the tiny duckweed or minute duckweed, is a species of aquatic flowering plant in the family Araceae. It is native to the central and eastern United States (but not the Deep South), and Quebec in Canada, and has been introduced to various locations around the world. It prefers still or very slowly moving waters.

Leavenworthia is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States. They are known generally as gladecresses.