Antirrhinum filipes (syn. Neogaerrhinum filipes) is a species of New World snapdragon known by the common name yellow twining snapdragon. It is native to the deserts of the southwestern United States and northern Mexico. This is a hairless annual herb growing long, thin, vinelike stems which climb on objects, including other plants, for support. The inflorescence is composed of a tendril-like pedicel which may be up to 10 centimeters long and coils tightly to help the plant climb. At its tip is a single snapdragon flower which is bright yellow to gold in color, dotted with dark red, and just over a centimeter long.

Anulocaulis annulatus is a species of flowering plant in the four o'clock family known by the common name valley ringstem. It is endemic to the Mojave Desert of California, especially in the vicinity of Death Valley. This is a perennial herb growing a number of thin, erect stems sometimes exceeding a meter in height from a thick caudex. The smooth stems have darkened internodes at intervals which are glandular and sticky. The leaves are mostly located at the base of the plant. Each has a short petiole and a thick, bumpy blade up to 10 centimeters wide. The leaf is coated in large, stiff hairs with glandular bases. The branching inflorescence bears clusters of very hairy, tubular flowers. Each flower is just under a centimeter long with a greenish throat and a striped pink face. The fruit is a small, hard body about half a centimeter long.

Bigberry manzanita (Arctostaphylos glauca) is a large evergreen shrub to small tree and is recognized as California's official state shrub. The leaves are large and light gray-green. In spring hanging bunches of urn-shaped white flowers cover the stems. Insects and hummingbirds love the flowers, and the fruit attracts all sorts of wildlife. The edible fruit, the largest of any manzanita, is round or egg-shaped and light red. This is a long-lived manzanita, moderate to slow growing. It can reach 100 years of age or more, and does not begin to fruit until it is around 20 years old.  It grows to 3 to 20 feet tall and 6 to 20 feet wide, with interesting twisting branches and smooth red bark that readily peels. 

It is best to plant bigberry manzanita on rocky slopes, avoiding south-facing slopes. It will usually do better if planted near large rocks, or at least with rocks placed around it. It prefers well-draining, acidic soil. It thrives in sun or part-shade.  After the first year, direct summer water will often kill this plant.

Grows best in sandy, coarse-grained or other fast draining soil. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected from santa Monica Mountains near Mulholland & Kanan Dume Road.

Grows best in sandy, coarse-grained or other fast draining soil. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected for the garden.

Grows best in sandy, coarse-grained or other fast draining soil. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected for the garden and introduced by Las pilitas Nursery.

Grows best in sandy, coarse-grained or other fast draining soil. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected for the garden.

Argemone corymbosa (Mojave prickly poppy) is a flowering plant in the family Papaveraceae native to the eastern Mojave Desert of the southwestern United States. It especially common around Cima, California and the nearby community of Kelso, California. The plant grows in sandy places and on dry slopes, and is very similar to desert prickly poppy. It is a perennial herbaceous plant growing to 40-80 centimeter tall, with distinctive orange latex in the stems. The leaves are 8-15 centimeter long, with prickly margins. The flowers are 4-8 centimeter diameter, with four white petals and an orange-colored center.

Argemone munita is a species of prickly poppy known by the common names flatbud prickly poppy and chicalote. This flower is native to California, where it is widespread throughout the western part of the state and its eastern deserts. Its range also extends into Baja California. This poppy bears its flowers on erect, spiny stems which can exceed a meter in height. The mint-green lobed leaves are also very prickly. The white poppy blooms have usually six crinkly petals, each up to 4 centimeters long. The center of the flower is surrounded by a dense ring of up to 250 small yellow stamens bearing the pollen. The fruits are spiny white capsules 3 to 5 centimeters long, each containing many small seeds.

Argyrochosma jonesii, with the common name is Jones' false cloak fern, is a species of fern native to the southwestern United States and northern Mexico. It grows in cracks in calcareous ledges and slopes in and around the Mojave and Sonoran Deserts.

Aristida adscensionis is a species of grass known by the common name sixweeks threeawn. It is native to the Americas but it is distributed nearly worldwide. It grows easily in disturbed and waste areas and has potential to become a weed. This annual grass is quite variable in appearance, its size and shape determined largely by environmental conditions. It grows in a tuft to heights between 5 and 80 centimeters. It forms a narrow flower cluster of spikelets, each fruit with three awns.

Aristida californica is a species of grass known by the common names California threeawn and Mojave threeawn. It is native to the Mojave Deserts and Sonoran of northern Mexico and California and Arizona. Aristida californica is a clumpy, hairy grass forming bushy tufts up to about 40 centimeters tall in its sandy habitat. The inflorescence contains hard spikelets with a long beak at the tip and awns up to 4. 5 centimeters long. Aristida californica is a clumpy, hairy grass forming bushy tufts up to about 40 centimeters tall in its sandy habitat. The inflorescence contains hard spikelets with a long beak at the tip and awns up to 4. 5 centimeters long.

Aristida oligantha is a species of grass known by the common names prairie threeawn and oldfield threeawn. It is native to the United States and southern Canada, and it is known from northern Mexico. It is a grass of many types of habitat, and it grows easily in dry areas with sandy or gravelly soils. It appears in disturbed and burned areas and is sometimes a weed of roadsides and railroads.

Purple three awn (Aristida purpurea) is a perennial bunchgrass known for its graceful, upright form and striking seed heads. The base of the plant appears green, while its feathery seed heads range in color from light brown to reddish-purple, creating a dynamic visual effect as they sway in the wind. This resilient grass thrives in various habitats across the United States, including deserts, mountains, and coastal regions.

Purple three awn's seeds provide food for some songbirds, supporting wildlife in natural landscapes. The grass also serves as a valuable native alternative to invasive species, offering a durable and low-maintenance option for landscaping. Its dense root system helps stabilize the soil and creates a matrix that supports the growth of wildflowers, enhancing biodiversity.

Purple three awn is a tough and attractive plant, its seeds can be sharp and may become a nuisance in areas with heavy foot traffic. The grass self-seeds readily, so it is important to manage young plants to prevent unwanted spread.

This hardy bunchgrass is a beautiful addition to native gardens and restoration projects, offering both aesthetic value and ecological benefits.

Red Three Awn (Aristida purpurea var. longiseta) is a native grass that grows in southern and central California. It is fast growing and moderately long-lived. It grows in an upright form to a height of 1.4 feet, with active growth during the fall, winter and spring. Flowers are yellow and bloom in the early spring. Leaves are medium green and deciduous. It tends to grow in sandy rocky soils, slopes and plains, at elevations from 1000-5200 feet.

Purple Threeawn (Aristida purpurea var. purpurea) is a native grass that grows in southern and central California. It tends to grow in sandy rocky soils, slopes and plains, at elevations from 800-2600 feet.

Arnica sororia is a species of arnica known by the common name twin arnica. It is native to western North America from British Columbia to California to Nebraska, where it grows in many types of habitat. It is a rhizomatous perennial herb producing one or more hairy, hairy stems 10 to 50 centimeters tall. There are several pairs of broadly lance-shaped leaves along along the stem, the lower ones borne on petioles. Leaves may reach up to 14 centimeters long. The flower cluster holds one to five daisylike flower heads lined with phyllaries coated in hairy hairs. The flower head has a center of hairy yellow disc florets and a fringe of yellow ray florets. The fruit is an achene a few millimeters long with a white pappus.

Artemisia arbuscula is a species of sagebrush known by the common names little sagebrush, low sagebrush, or black sagebrush. It is native to the western United States from Washington to California to Colorado, where it grows in open, exposed habitat on dry, sterile soils high in rock and clay content. This is a gray-green to gray shrub forming mounds generally no higher than 30 centimeters. Its many branches are covered in hairy leaves each less than a centimeter long. The flower cluster is a spike-shaped array of clusters of hairy flower heads. Each head contains a few pale yellow disc florets. The fruit is a tiny achene less than a millimeter wide.

With its aromatic fragrance and threadlike, silvery-green foliage, California Sagebrush (Artemesia californica) is a feast for the senses. This resilient, easy-to-grow shrub thrives in the toughest environments. It's a good choice for dry, sunny, and sloped areas. It tolerates nutrient-poor sandy soil, as long as it's well-draining.

California Sagebrush is extremely drought adapted; some summer water is optional but not required. A little pruning keeps it compact in the garden.

This important coastal scrub plant supports the California gnatcatcher and quail, as well as other bird and insect species.

Canyon Gray Sagebrush (Artemisia californica 'Canyon Gray') is a natural cultivar of California Sagebrush (Artemisia californica) from San Miguel Island, one of the Channel Islands in Southern California. This prostrate horticultural selection was collected and introduced by the Santa Barbara Botanic Garden.

This plant can become a large scale groundcover, forming a 1 to 2 feet high compact mat of finely textured silvery gray-green foliage, that spreads 4 to 10 feet wide. It works well on dry slopes and draping down over walls. The flowers are fairly inconspicuous, the foliage is very aromatic when brushed.

Canyon Gray Sagebrush requires little irrigation once established, though it can go semi-dormant by later summer without occasional irrigation. It is reportedly hardy to about 20-25° F.

It tolerates almost any soil type with drainage. It prefers full sun in coastal sites, and sun to part shade in inland sites. To keep the fast growing foliage dense, the plantings can look best if 'mowed' or heavily trimmed down every 1 or 2 years.

Horticultural selection from Artemisia californica from Montara Mountain south of san Francisco. If you need an unusual groundcover that can tolerate the hot dry summer, try this low, spreading artemisia out. This lovely groundcover sagebrush has a nice neat, dense form with aromatic gray green foliage. It's a great way to add texture, color contrast and fragrance in a drought-tolerant garden. Despite it's north coast origins we have found 'Montara' to thrive in hot inland conditions with almost no supplmental water. Some speculate that it is a natural hybrid between Artemisia calif. and Artemisia pycnocephala. This is fast becoming a landscaping favorite, but is not commercially grown in many nurseries and so is hard to find.

'Montara' was selected from a cutting at Montara Mountain by Roger Raiche and introduced by Wildwood nursery in 1987. Tolerates almost any soil type. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected for the garden.

Silver Sagebrush (Artemisia cana) is a native shrub that grows in Central and Northern California, primarily in the High Cascade Range, the Sierra Nevada Foothills and High Sierra Nevada regions. It is moderately fast growing and long-lived. It grows in an upright form to a height of 5 feet, with active growth during the spring, summer, fall. Flowers are yellow and bloom in the late summer. Leaves are gray-green and deciduous. It tends to grow in meadows and streambanks and gravelly places, at elevations from 5200-10800 feet.

Artemisia cana is a species of sagebrush native to western and central North America, a member of the sunflower family. It known by many common names, including silver sagebrush, sticky sagebrush, silver wormwood, hoary sagebrush, and dwarf sagebrush. Artemisia cana, Silver sagebrush, is an aromatic shrub found in grasslands, floodplains and montane forests. Artemisia cana is native to the Canadian provinces of British Columbia, Alberta, Saskatchewan and Manitoba and the American states of Alaska, Oregon, California, Idaho, Nevada, Utah, Arizona, Wyoming, Colorado, New Mexico, North and South Dakota, Nebraska and Minnesota. The type specimen of Artemisia cana was described informally by its collector, Meriwether Lewis (collected on October 1, 1804, in the vicinity of Centinel Creek in South Dakota, during the epic Lewis and Clark Expedition), in the following passage from Original Journals of Lewis and Clark, edited by Thwaites in 1904 :The type specimen of Artemisia cana was described informally by its collector, Meriwether Lewis (collected on October 1, 1804, in the vicinity of Centinel Creek in South Dakota, during the epic Lewis and Clark Expedition), in the following passage from Original Journals of Lewis and Clark, edited by Thwaites in 1904 :

Tarragon or Dragon's-wort (Artemisia dracunculus) is a perennial herb in the family Asteraceae. Plants in this genus are frequently called Wormwood, but this species is usually known as Tarragon. A European cultivar of this species is used as a popular culinary spice. The species name "dracunculus" leads to the common name "dragon herb." It is native to a wide area of the Northern Hemisphere from easternmost Europe across central and eastern Asia to India, western North America, and south to northern Mexico. The North American populations may, however, be naturalized from early human introduction. In California it is found primarily in the southern half of the state, in the coastal mountains and Sierras. Tarragon grows to 120-150 centimeter tall, with slender branched stems. The leaves are lance-shaped, 2-8 centimeter long and 2-10 millimeter broad, glossy green, with an entire margin. The flowers are produced in small capitulae 2-4 millimeter diameter, each capitulum containing up to 40 yellow or greenish-yellow florets. Some sources refer to this plant as an unattractive weed. It is cultivated primarily for culinary purposes but also has some wildlife value.

Artemisia ludoviciana is a species of sagebrush known by several common names, including silver wormwood, white sagebrush, and gray sagewort. It is native to North America where it is widespread coast to coast, but many subspecies are found only in the western United States. This is a rhizomatous perennial herb growing to heights between 30 centimeters and one meter. The stems bear linear leaves up to 11 centimeters long. The stems and foliage are covered in woolly gray or white hairs. The top of the stem is occupied by a narrow flower cluster of many nodding flower heads. Each small head is a cup of hairy phyllaries surrounding a center of yellowish disc florets and is about half a centimeter wide. The fruit is a minute achene. This plant was used by many Native American groups for a variety of medicinal, veterinary, and ceremonial purposes.

Grows best in sandy, coarse-grained or other fast draining soil. Selected for the garden.

Grows best in sandy, coarse-grained or other fast draining soil. Selected for the garden.

Grows best in sandy, coarse-grained or other fast draining soil. Selected for the garden.

Artemisia spinescens is a North American species of sagebrush in the sunflower family, known by the common name budsage. Many sources treat the species separately from genus Artemisia and named Picrothamnus desertorum. This separation has not, however, been supported by genetic analysis. Artemisia spinescens is native to the western United States from southern + eastern California and the Great Basin, north to Idaho and Montana, and east to western Colorado and northwestern New Mexico. Artemisia spinescens grows in scrub and other habitat on clay and gravel-rich soils. It thrives on salty soils, growing with other salt-tolerant plants such as saltbushes ('Atriplex sp. ). It is adapted to very dry climates. Artemisia spinescens is a squat shrub forming a rounded bush up to 30 to 50 centimeters in maximum height. Its tangled branches are woolly when new and thorny and rough when aged. The stem is woody and corky. The strongly aromatic foliage is made up of many small, fuzzy leaves divided into narrow, pointed segments. It is deciduous, dropping its leaves during the dry summer when it becomes dormant. The inflorescence is a raceme of small clusters of flower heads sprouting from leaf axils. Each head contains several tiny bell-shaped sterile disc florets and a few fertile ray florets. The fruit is a tiny hairy achene less than a millimeter long. Uses. This plant is considered good forage for wild and domestic grazing animals early in the season when the foliage is new and soft. Later in the season when the plant produces large quantities of bitter volatile oils it becomes unpalatable.

Big Sagebrush (Artemisia tridentata) is a dense, silvery-gray shrub with an upright form, growing up to 4 feet tall and wide. Its highly aromatic foliage lasts year-round, and, unlike other sages, it develops a true woody trunk and branches, making it long-lived. In maturity, the twisted trunk adds unique visual appeal. The flowers, small and yellow-green, are often inconspicuous.

This plant thrives in full sun and well-drained soil, is nitrogen-fixing, and is drought-tolerant. It provides significant wildlife value, attracting a variety of insects, birds, and small mammals with its flowers and seeds.Big Sagebrush (Artemisia tridentata) is a dense, silvery-gray shrub with an upright form, growing up to 4 feet tall and wide. Its highly aromatic foliage lasts year-round, and, unlike other sages, it develops a true woody trunk and branches, making it long-lived. In maturity, the twisted trunk adds unique visual appeal. The flowers, small and yellow-green, are often inconspicuous.

This plant thrives in full sun and well-drained soil, is nitrogen-fixing, and is drought-adapted. It provides significant wildlife value, attracting a variety of insects, birds, and small mammals with its flowers and seeds.

Asclepias albicans is a species of milkweed known by the common names whitestem milkweed and wax milkweed. It is native to the Mojave and Sonoran Deserts of California, Arizona, and Baja California. This is a spindly erect shrub growing usually 1 to 3 meters tall, but known to approach four meters. The sticklike branches are mostly naked, the younger ones coated in a waxy residue and a thin layer of woolly hairs. Leaves are ephemeral, growing in whorls of three on the lower branches and falling off after a short time. They are linear in shape and up to 3 centimeters long. The flower cluster is an umbel appearing at the tips of the long branches and sprouting from the sides at nodes. The flower cluster contains many small purple-tinted greenish flowers, each with a central array of bulbous hoods, and corollas reflexed back against the stalk. The plant may flower in any season except summer. The fruit is a large, long, thick follicle which dangles in bunches from the branch nodes.

Asclepias cryptoceras is a species of milkweed known by the common names pallid milkweed and Humboldt Mountains milkweed. It is native to the western United States, where it grows in many types of habitat, especially dry areas. This is a perennial herb growing low against the ground or drooping. It arises from a fleshy, woody rhizome-like root. The thick leaves are round to heart-shaped and arranged oppositely on the short stem. The flower cluster is a cluster of small flowers with centers of bright to dull pink hoods surrounded by pale-colored reflexed corollas. The fruit is a follicle held erect on a small stalk.

Asclepias erosa is a species of milkweed known commonly as desert milkweed. It is native to southern California, Arizona, and northern Baja California, where it is most abundant in the desert regions. This milkweed is a perennial herb with erect yellow-green stems and foliage in shades of pale whitish-green to dark green with white veining. It may be hairless to very fuzzy. The sturdy, pointed leaves grow opposite on the stout stem. Atop the stem is a rounded umbel of yellowish or cream-colored flowers. Each flower has thick, reflexed corollas beneath a flower center composed of rounded, horned filaments. The plant is filled with a viscous sap that was roasted to a solid and enjoyed as a sort of chewing gum by local Native American groups.

Asclepias subulata is a species of milkweed known commonly as the rush milkweed or ajamete. This is an erect perennial herb which loses its leaves early in the season and stands as a cluster of naked stalks. Atop the stems are flower clusters of distinctive flowers. Each cream-white flower has a reflexed corolla that reveals the inner parts, a network of five shiny columns, each topped with a tiny hook. The fruit is a pouchlike follicle that contains many flat, oval seeds with long, silky hairlike plumes. This milkweed is native to the desert southwest of the United States and northern Mexico.

Astragalus acutirostris is a species of milkvetch known by the common name sharpkeel milkvetch. It is native to the Mojave Desert and surroundings of California, Nevada, and Arizona, where it grows in dry, sandy, gravelly areas. Astragalus acutirostris is an annual legume growing a hairy reddish stem no more than 30 centimeters long along the ground or slightly upright. The small leaves are made up of several pairs of small oblong leaflets, each less than a centimeter long and often with notched tips. The inflorescence contains one to six white or pinkish-tinted pealike flowers, each with a banner that curves back. Astragalus acutirostris is an annual legume growing a hairy reddish stem no more than 30 centimeters long along the ground or slightly upright. The small leaves are made up of several pairs of small oblong leaflets, each less than a centimeter long and often with notched tips. The inflorescence contains one to six white or pinkish-tinted pealike flowers, each with a banner that curves back. The fruit is a slightly curved, narrow legume pod 1 to 3 centimeters long. The pod is thin-walled and coated sparsely in white hairs like the rest of the plant.

Astragalus andersonii is a species of milkvetch known by the common name Anderson's milkvetch. It is native to eastern California and western Nevada, where it is found in the plateaus at the foot of the Sierra Nevada, including the Modoc Plateau. This is a small perennial herb forming a thick patch on the ground, the stems reaching about 20 centimeters in maximum length. The plant is coated in dense gray to white wavy hairs. The leaves are up to 10 centimeters long and made up of several oval-shaped leaflets. The inflorescence is a projecting or upright array of 12 to 26 pealike flowers. Each flower is white, often purple-tinted or purple-veined, and between 1 and 2 centimeters long. The fruit is a curved legume pod 1 to 2 centimeters long. This is a small perennial herb forming a thick patch on the ground, the stems reaching about 20 centimeters in maximum length. The plant is coated in dense gray to white wavy hairs. The leaves are up to 10 centimeters long and made up of several oval-shaped leaflets. The inflorescence is a projecting or upright array of 12 to 26 pealike flowers. Each flower is white, often purple-tinted or purple-veined, and between 1 and 2 centimeters long. The fruit is a curved legume pod 1 to 2 centimeters long. It is coated in very long white hairs and dries to a thick papery texture, the beans inside rattling with the wind.

Astragalus californicus is a species of milkvetch known by the common name Klamath Basin milkvetch. It is native to the Klamath Mountains and surrounding High Cascade Ranges of northern California and southern Oregon, where it grows in scrub and woodland habitat. Astragalus californicus is a perennial herb forming a sturdy open clump of upright stems growing up to 1. 5 feet (0. 46 m) tall. The leaves are several centimeters long and made up of green leaflike leaflets. The inflorescence is a loose array of light yellow to cream-colored pealike flowers, each between 1 and 2 centimeters long. The fruit is a hanging legume pod 3 or 4 centimeters long. It is flat and narrow, with a hairy surface, and it dries to a thick papery texture.

Astragalus canadensis is a common and widespread member of the milkvetch genus in the legume family, known commonly as Canadian milkvetch. The plant is found throughout Canada and the United States in many habitats including wetlands, woodlands, and prairies. It sends out several thin, erect, green stems, bearing leaves that are actually made up of pairs of leaflets, each leaflet up to 3 centimeters in length. It has flower clusters of tubular, greenish-white flowers which yield beanlike fruits within pods that rattle when dry. Like other Astragalus species, A. canadensis is somewhat toxic, but it has been used medicinally by Native American groups such as the Blackfoot and Lakota people, particularly the roots.

Astragalus casei is a species of milkvetch known by the common name Case's milkvetch. It is native to the Mojave Desert and its sky island woodlands of eastern California and western Nevada. Astragalus casei is a wiry, branching perennial herb forming an open clump of jagged stems up to 40 centimeters long. Leaves are up to 10 centimeters long and made up of thin, narrow, lance-shaped leaflets. The plant bears an inflorescence of up to 25 pink, lilac, or white flowers. Each flower is between 1 and 2 centimeters long. Astragalus casei is a wiry, branching perennial herb forming an open clump of jagged stems up to 40 centimeters long. Leaves are up to 10 centimeters long and made up of thin, narrow, lance-shaped leaflets. The plant bears an inflorescence of up to 25 pink, lilac, or white flowers. Each flower is between 1 and 2 centimeters long. The fruit is a hanging legume pod 2 to 5 centimeters long. It is narrow, slightly hairy, and tipped with a sharp beak. It is pulpy when new and it dries to a tough texture.

Astragalus cimae is a species of milkvetch known by the common name Cima milkvetch. It is native to the Mojave Desert and its sky island woodlands of eastern California western Nevada, especially on calcareous soils, including the Cima Dome area in the Mojave National Preserve. Astragalus cimae is a spreading perennial herb with somewhat fleshy stems up to about 25 centimeters long. Leaves are up to 11 centimeters long and made up of oval or rounded leaflets. The plant bears an inflorescence of up to 25 flowers with reddish or pinkish purple petals sometimes tipped with white. Each flower is between 1 and 1. 5 centimeters long. The fruit is a legume pod with usually two inflated chambers. Astragalus cimae is a spreading perennial herb with somewhat fleshy stems up to about 25 centimeters long. Leaves are up to 11 centimeters long and made up of oval or rounded leaflets. The plant bears an inflorescence of up to 25 flowers with reddish or pinkish purple petals sometimes tipped with white. Each flower is between 1 and 1. 5 centimeters long. The fruit is a legume pod with usually two inflated chambers.

Astragalus didymocarpus is a species of milkvetch known by the common names dwarf white milkvetch and two-seeded milkvetch. It is native to the southwestern United States and northern Mexico, where it can be found in many types of habitat. Astragalus didymocarpus is a slender, hairy annual herb growing erect to about 30 centimeters tall, drooping, or flat on the ground in a spreading clump. The leaves are up to 7 or 8 centimeters long and are made up of narrow to oblong leaflets. The inflorescence is a cluster of up to 30 purple-tinted white flowers, each under a centimeter long. The inflorescence is covered in long black and white hairs. Astragalus didymocarpus is a slender, hairy annual herb growing erect to about 30 centimeters tall, drooping, or flat on the ground in a spreading clump. The leaves are up to 7 or 8 centimeters long and are made up of narrow to oblong leaflets. The inflorescence is a cluster of up to 30 purple-tinted white flowers, each under a centimeter long. The inflorescence is covered in long black and white hairs. The fruit is a small, spherical legume pod a few millimeters wide which dries to a stiff papery texture. Varieties: There are several varieties of Astragalus didymocarpus: A. d. var. didymocarpus - erect herb found in western Nevada and much of California, A. d. var. dispermus - prostrate form native to the desert regions, A. d. var. milesianus (Miles' milkvetch) - rare variety found only along the Central Coast of CaliforniaA. d. var. obispoensis - form with ascending stems native to coastal southern California and Baja California

Astragalus douglasii is a species of milkvetch known by the common name Douglas' milkvetch. It is native to California and Baja California, where it can be found in many types of desert, valley, chaparral and woodlands, and montane habitats. Astragalus douglasii is a bushy perennial herb producing a number of erect or prostrate stems up to a meter long. The abundant leaves are up to 18 centimeters long and are made up of oval-shaped leaflets. The open inflorescence holds up to 30 whitish to pale yellow flowers, each about a centimeter long. Astragalus douglasii is a bushy perennial herb producing a number of erect or prostrate stems up to a meter long. The abundant leaves are up to 18 centimeters long and are made up of oval-shaped leaflets. The open inflorescence holds up to 30 whitish to pale yellow flowers, each about a centimeter long. The fruit is an inflated legume pod up to 6 centimeters long and 3 wide which dries to a thin, papery texture. Varieties: There are three varieties of Astragalus douglasii:A. d. var. douglasii - limited to CaliforniaA. d. var. parishii (Parish's milkvetch) - found throughout the mountain ranges of Southern CaliforniaA. d. var. perstrictus (Jacumba milkvetch) - rare variety limited to San Diego County, California, and northern Baja California

Astragalus filipes is a species of milkvetch known by the common name basalt milkvetch. It is native to western North America from British Columbia to California to Utah, where it grows in many types of habitat, especially dry areas. Astragalus filipes is a clumpy perennial herb growing 30 to 90 centimeters tall. The leaves are up to 12 centimeters long and made up of several widely spaced leaflets which are linear to oval in shape. The open inflorescence holds up to 30 off-white to pale yellow flowers each 1 to 1. 5 centimeters long. Astragalus filipes is a clumpy perennial herb growing 30 to 90 centimeters tall. The leaves are up to 12 centimeters long and made up of several widely spaced leaflets which are linear to oval in shape. The open inflorescence holds up to 30 off-white to pale yellow flowers each 1 to 1. 5 centimeters long. The fruit is a hanging legume pod up to 3 centimeters long. It is long and thin and dries to a papery texture.

Astragalus gibbsii is a species of milkvetch known by the common name Gibbs' milkvetch. It is native to eastern California, the north-central Sierra Nevada, and western Nevada, where it grows in the pine forest habitat of the mountains and the sagebrush of the plateaus. Astragalus gibbsii is low-lying perennial herb forming clumps of hairy, gray-green stems up to 35 centimeters long. Leaves are up to about 9 centimeters long and are made up of several pairs of oval to oblong leaflets. The large inflorescence bears up to 30 yellowish or cream-colored pouched, podlike flowers, each between 1 and 2 centimeters long. Astragalus gibbsii is low-lying perennial herb forming clumps of hairy, gray-green stems up to 35 centimeters long. Leaves are up to about 9 centimeters long and are made up of several pairs of oval to oblong leaflets. The large inflorescence bears up to 30 yellowish or cream-colored pouched, podlike flowers, each between 1 and 2 centimeters long. The fruit is a hanging legume pod 2 to 3 centimeters long. It is fleshy when new and dries to a hairy, leathery texture.

Astragalus kentrophyta is a species of milkvetch known by the common name spiny milkvetch. It is native to western North America from central to west Canada, to California, to New Mexico. It grows in rocky mountainous areas, such as the Sierra Nevada, and on plateaus. This perennial herb is somewhat variable in appearance, especially across Varieties: It is generally small and low-lying, growing in spiny mats or clumps. The short stems are hairy. The small leaves are made up of smaller oval-shaped or narrow linear, spine-tipped leaflets. The inflorescence bears one to three white to pinkish purple flowers, each less than a centimeter long. The fruit is a hairy, flattened legume pod 4 to 9 millimeters in length. Varieties: There are several varieties of Astragalus kentrophyta species, including:A. k. var. coloradoensis (Colorado spiny milkvetch) - limited to Utah and ArizonaA. k. var. danaus (Sweetwater Mountains milkvetch) - endemic to eastern CaliforniaA. k. var. douglasii (Douglas' spiny milkvetch, thistle milkvetch) - limited to Oregon and Washington but possibly extirpated from the latterA. k. var. elatus (tall spiny milkvetch, spiny-leaved) - found throughout the western United StatesA. k. var. neomexicanus (New Mexico spiny milkvetch) - endemic to New MexicoA. k. var. tegetarius (mat milkvetch) - distributed throughout the western USA. k. var. ungulatus - endemic to Nevada

Astragalus layneae is a species of milkvetch known by the common name widow's milkvetch. It is native to the Mojave Desert and surrounding mountain ridges in California and Nevada. This is a small perennial herb growing from a deep rhizome and producing erect stems no taller than about 16 centimeters. The leaves are made up of many oval to rounded leaflets, and stem and leaves are coated in gray-green hairs. This is a small perennial herb growing from a deep rhizome and producing erect stems no taller than about 16 centimeters. The leaves are made up of many oval to rounded leaflets, and stem and leaves are coated in gray-green hairs. The inflorescence is covered in dark hairs and bears up to 45 flowers. Each flower is between one and two centimeters in length and has white petals tipped and streaked in bright purple. The fruit is a hanging legume pod up to 6. 5 centimeters long. It is curved in shape and leathery and hairy in texture.

Astragalus lentiginosus is a species of legume known by the common names spotted locoweed and freckled milkvetch. It is native to western North America, where it grows in many habitat types. There are a great number of wild varieties of this species, and they vary in appearance. The flower and the fruit of a given individual are generally needed to identify it down to the variety. As a species, Astragalus lentiginosus is distributed throughout the Great Basin of North America, west from the Rocky Mountains to the California Coast Ranges, south to Mexico, and north to British Columbia. The varieties are largely limited to marginal habitats such as disturbed sites in the arid regions of the continent. The group also contains a number of edaphic specialists which occur at desert seeps, which frequently exhibit high levels of calcium carbonate. Astragalus lentiginosus is a perennial or occasionally annual herb with leaves up to 15 centimetres (5. 9 inches) long divided into many pairs of small leaflets. The plant is prostrate to erect in form and quite woolly to nearly hairless. The inflorescence holds up to 50 pea-like flowers which may be purplish or whitish or a mix of both.