Chorizanthe cuspidata is a species of flowering plant in the buckwheat family known by the common name San Francisco spineflower. It is endemic to California, where it is known only from the San Francisco Bay Area and to the immediate north and south. It grows in sandy coastal habitat. The Chorizanthe cuspidata plant grows flat along the ground, its stems extending up to about half a meter in length. The leaves are located about the base of the stem and are generally oval in shape and up to 5 centimeters long. The herbage is hairy to woolly in texture and green to reddish in color. The Chorizanthe cuspidata plant grows flat along the ground, its stems extending up to about half a meter in length. The leaves are located about the base of the stem and are generally oval in shape and up to 5 centimeters long. The herbage is hairy to woolly in texture and green to reddish in color. The inflorescence is a dense cluster of cylindrical flowers, each bordered by white or pink bracts with hooked or straight spines at the tips. The flower itself is 2 or 3 millimeters long, white or pink, and hairy. The minute tepals are lobed, with the central lobe longest and coming to a point. VarietiesThere are two varieties of this species:Chorizanthe cuspidata var. cuspidata is quite rare due to its Bay Area habitat having been mostly consumed for development. Chorizanthe cuspidata var. villosa can be found in the protected habitat of Point Reyes National Seashore.

Chorizanthe diffusa is a species of flowering plant in the buckwheat family known by the common name diffuse spineflower. It is endemic to California, where it grows on the coastline and mountains of the Central Coast, in sandy scrub, woodland, and forest habitat. It is erect to prostrate in form, its stem generally no longer than 15 or 20 centimeters. The leaves are up to 2 centimeters long and mainly arranged about the base of the plant. The inflorescence is a cluster of flowers, each surrounded by six hook-tipped bracts. The margins of the bracts proximal to the long hooked tip may be very thin and nearly invisible to wide and obvious, and they may be green to white to purplish. The flower itself is about 3 millimeters wide and white with a yellow throat. The tips of its tepals may be smooth or jagged or toothed.

Chorizanthe douglasii, San Benito spineflower, is a species of flowering plant in the buckwheat family known by the common name Douglas' spineflower. It is endemic to California, where it grows in the mountains of the Central Coast Range from the Santa Lucia Range east to the Gabilan Range. It is an erect herb producing a hairy stem up to about half a meter in maximum height. The leaves are up to 4 centimeters long and mainly arranged about the base of the plant, with a whorl of leaves at the middle of the stem as well. The inflorescence is a cluster of flowers, each surrounded by six purple to bright pink bracts which may be all fused together. The bracts are tipped in straight awns. The flower itself is 3 or 4 millimeters wide and white or pink in color. It is an erect herb producing a hairy stem up to about half a meter in maximum height. The leaves are up to 4 centimeters long and mainly arranged about the base of the plant, with a whorl of leaves at the middle of the stem as well. The inflorescence is a cluster of flowers, each surrounded by six purple to bright pink bracts which may be all fused together. The bracts are tipped in straight awns. The flower itself is 3 or 4 millimeters wide and white or pink in color.

Chorizanthe fimbriata, (Fringed spineflower) is an annual plant in the Polygonaceae family, the buckwheats. It is a member of the genus Chorizanthe, the spineflowers, and is native to southern California and northern Baja California. It is endemic to the San Jacinto Mountains (California) and the Peninsular Ranges in Southern California and Baja California, below 1,600 metres (5,200 ft). It is found in coastal sage and montane chaparral and woodlands habitats.

The Chorizanthe fimbriata plant is low-lying at 3-6 inches in height, and 6-12 inches in diameter. It bears small star-shaped 5-lobed pinkish flowers with yellow tubes.

Chorizanthe howellii is a species of flowering plant in the buckwheat family known by the common names Mendocino spineflower and Howell's spineflower. It is endemic to coastal Mendocino County, California, where it is known only from the sand dunes and coastal scrub near Fort Bragg. It is estimated that 95% of the remaining individuals of this plant are part of a single population growing at MacKerricher State Park. It is a federally listed endangered species. This is a decumbent or spreading species, growing hairy stems along the ground up to about 10 centimeters long. The inflorescence is a cluster of flowers, each surrounded by a starlike array of six spreading white bracts tipped with straight brown awns. The flower itself is a few millimeters wide and white to pale pink in color.

Chorizanthe leptotheca is a species of flowering plant in the buckwheat family known by the common names Ramona spineflower and Peninsular spineflower. It is native to the Peninsular Ranges of southern California and Baja California, where it grows in chaparral and forest habitat. It is very similar to its close relative, Turkish rugging (Chorizanthe staticoides). Chorizanthe leptotheca is an erect herb growing up to about 35 centimeters tall. The leaves are basal, oval in shape and up to about 3 centimeters long. The herbage is fuzzy to quite hairy in texture, and generally reddish in color. The inflorescence is a loose cluster of flowers, each surrounded by six reddish bracts coated in curly hairs and tipped in hooked awns. The flower itself is up to 6 millimeters wide, pink or red in color and hairy.

Chorizanthe membranacea is a species of flowering plant in the buckwheat family known by the common name pink spineflower. It is native to Oregon and California, where it is widespread and in some areas quite common. It can be found in a wide variety of habitats. This herb grows erect to a maximum height near one meter. It is woolly in texture and most of its parts may bear a pink tint. The leaves are mostly linear in shape and they may occur along the stem as well as at the base. The longest may reach 5 centimeters. The flower cluster is a dense cluster of flowers, each surrounded by a unit of six fused leafs which are generally white to pinkish in color. The leafs are tipped with hooked awns. The flower itself is just a few millimeters long, white to pink, and quite hairy. There are sometimes small flower clusters located in the cauline leaf axils along the stem. This species is easily distinguished from other spineflowers by its relative abundance of leaves, its height and upright habit, and the fusion of the leafs of the involucre into a continuous body.

Chorizanthe obovata is a species of flowering plant in the buckwheat family known by the common name spoonsepal spineflower. It is endemic to California, where it grows in the mountains of the Central Coast Range from Monterey to Santa Barbara Counties. Chorizanthe obovata grows in chaparral and woodland habitat. The plant is variable in appearance, growing prostrate or erect, its stem up to 40 centimeters long. The herbage is red to gray-green in color and hairy in texture. The inflorescence is a cluster of flowers surrounded by six bracts, each tipped with hooked awns except the longest, which may have a straight awn. The flower itself is 4 or 5 millimeters wide and white to pinkish in color.

Chorizanthe orcuttiana is a rare small annual plant in the buckwheat (Polygonaceae) family. Its common name is San Diego spineflower, and it is endemic to San Diego County, California. The plant is diminutive, and a hand-lens is necessary for proper identification. The plant is very sensitive to temperature and precipitation, and under drought or hot conditions the seeds will not germinate or survive. The plant is visible anywhere from February through July during good rain year, but most years the plant is only visible from April to June. Each minute flower yields one seed. This species is octoploid and probably arose through hybridization between other Chorizanthe, perhaps C. procumbens and C. polygonoides.

Chorizanthe palmeri is a species of flowering plant in the buckwheat family known by the common name Palmer's spineflower. It is endemic to California, where it is known only from the Central Coast Ranges of western Monterey and San Luis Obispo Counties. It grows on mountain slopes of serpentine soils. This herb is variable in appearance, with isolated populations often appearing quite different from one another, but not different enough to be considered separate taxa. In general, it is an erect plant growing up to 40 centimeters tall. The stem, leaves, bracts, and flowers can all be reddish to decidedly purple-red in color, and when a good-sized population is in bloom it can be spotted even from aircraft as a mark of red against an otherwise brownish hillside landscape. The inflorescence is a cluster of flowers surrounded by six red or purple bracts with hooked awns. The flower is a few millimeters across and is red or purple with a white or yellow throat.

Chorizanthe parryi is a species of flowering plant in the buckwheat family known by the common name Parry's spineflower and San Bernardino spineflower. The plant is endemic to Southern California, where it is found in the San Bernardino Mountains, San Gabriel Mountains and Western Transverse Ranges, the Colorado Desert, and along the southern coast. It is found mainly in chaparral scrub plant communities. Chorizanthe parryi is a small, sprawling herb with roughly hairy stems spreading along the ground or somewhat upright. There are a few leaves up to four centimeters long located mainly around the base of the stems where they emerge from the ground. The flowers have urn-shaped bases of woolly bracts whose points may be straight or hooked, the characteristic which differentiates the two Varieties: The tiny flower is white and sometimes hairy. Varieties: Chorizanthe parryi var. fernandina - San Fernando Valley spineflower, endangered species. Chorizanthe parryi var. parryi

Chorizanthe polygonoides is a species of flowering plant in the buckwheat family known by the common name knotweed spineflower. It is native to California and Baja California, where it grows widely scattered in many types of habitat. It is a petite plant taking a prostrate form with stems just a few centimeters long at maximum. It may be green to red in color and is hairy in texture. The leaves are no more than a centimeter long and the flower is under two millimeters wide. The minute flower is surrounded by three hairy point-tipped bracts.

Chorizanthe procumbens is a species of flowering plant in the buckwheat family known by the common name prostrate spineflower. It is native to California and Baja California, where it grows in scrub and chaparral habitat. It is variable in appearance, up to 25 centimeters long or much shorter, usually growing prostrate along the ground. It is often yellowish green in color but there are grayish and reddish forms. The inflorescence is a cluster of flowers with each minute white or yellow flower surrounded by spine-tipped bracts.

Chorizanthe pungens is a species of flowering plant in the buckwheat family known by the common name Monterey spineflower. It is endemic to California, where it is known from the San Francisco Bay Area south along the Central Coast. It grows mainly in coastal habitat and that of the hills and mountains overlooking the coastline. This is a generally erect but sometimes spreading or prostrate plant with stems up to half a meter in length. It is green to gray to red in color and usually hairy in texture. The leaves are located at the base of the plant; there are also bracts along the stem at the bases of the inflorescences which look like leaves. The inflorescence is a dense cluster of flowers, each flower surrounded by six white to pink hairy bracts tipped in hooked awns. The flower itself is only a few millimeters wide with jagged tepals. Varieties: There are two varieties of this species:var. pungens is the more commonvar. hartwegiana is known only from the Santa Cruz Mountains north of Santa Cruz. This variety, known as the Ben Lomond spineflower, is treated as a federally listed endangered species. It is found in the same type of unique habitat, known as the Zayante sandhills, as other local rare endemic life forms such as the Ben Lomond wallflower Erysimum teretifolium and the Zayante band-winged grasshopper Trimerotropis infantilis. Threats to this plant and other endemic species include the destruction of the local habitat during sand mining.

Chorizanthe rectispina is a species of flowering plant in the buckwheat family known by the common names prickly spineflower and straight-awned spineflower. It is endemic to California, where it is known from about twenty occurrences from Monterey to Santa Barbara Counties. It grows in dry habitat types such as chaparral and woodland in the hills of the Central Coast Ranges. It is a low, spreading plant with stems up to about 25 centimeters long, grayish to greenish in color and hairy in texture. The inflorescence is a cluster of flowers, each flower surrounded by six hairy bracts which are grayish to pink in color and tipped with awns. One bract is longer than the others and has a straight awn, and the other smaller bracts may have hooked awns. The tiny flower at the center of the bract array is a few millimeters wide and white and yellow in color.

Chorizanthe rigida, with the common names of devil's spineflower, rigid spineflower, spiny-herb, rigid spiny-herb, is an annual plant in the Polygonaceae family the buckwheats. It is a member of the genus Chorizanthe, the spineflowers and is found in the southwestern United States and northwest Mexico, in the states of California, Nevada, Utah, Arizona, Baja California, and Sonora. Chorizanthe rigida is a common desert plant found in the Sonoran and Mojave Desert - in bajadas (washes), flat mesas that flood with annual rains, and rocky hillsides and ridgelines. A locale range example is its presence in most habitats of the Muggins Mountains Wilderness in southeastern Arizona. In desert flats, the short 3 inch plant can be easily obscured, by downstream-washed debris that easily collects on the spineflower skeleton. Thus small hillocks of debris are found, a spineflower in the core; possibly this is the advantageous form of germinating at least the source location into a second generation. In flat mesas the plant can be hidden under clumps and not seen. On a roadside, its skeleton will be left as a single erect plant, the taller plants being found in the highest water-pooled areas.

Chorizanthe robusta is a species of flowering plant in the buckwheat family. It is endemic to California, where it is a rare, federally listed endangered species. C. robusta is variable in form, growing decumbent or erect and reaching a maximum length of half a meter. It is grayish in color and hairy. The inflorescence is made up of several flowers with each flower surrounded by white or pink bracts with hooked tips. The flower itself is just a few millimeters long and white to pink in color. Varieties: It is composed of two varieties:var. robusta, known generally as the robust spineflower, which is known only from southern Santa Cruz and Monterey Counties,var. hartwegii, the Scotts Valley spineflower, which is known from a few locations in Scotts Valley in Santa Cruz County. The plant is closely related to Chorizanthe pungens, another rare endemic from the area.

Chorizanthe spinosa is an uncommon species of flowering plant in the buckwheat family known by the common name Mojave spineflower. It is endemic to California, where it is known only from the scrub habitat at the western edges of the Mojave Desert. Chorizanthe spinosa is prostrate or upright, reaching up to 40 centimeters in length. It is grayish in color and hairy in texture. The inflorescence is an open or dense cluster of flowers, with each flower surrounded by green, gray, or pink bracts. There are generally five bracts per flower, with one bract much longer than the others. The bracts are tipped with straight awns. The flower at the center is only about 3 millimeters wide and usually white in color.

Chorizanthe staticoides is a species of flowering plant in the buckwheat family known by the common name Turkish rugging. It is endemic to California, where it is a common member of the flora in the chaparral and scrub habitats in a number of regions. This is a plant which is quite variable in morphology, producing small patches on the ground or growing erect to heights over half a meter. The leaves measure from just a few millimeters to about 8 centimeters long. Most of them grow at the base of the fuzzy green or reddish stem. The top of the stem branches neatly into flat-topped flower clusters packed densely with tiny flowers. Each flower has a cylindrical base of six sharp-tipped leafs in shades of red to purple or green. Within this involucre is the pink to red flower which is a few millimeters wide and contains nine tiny stamens.

Chorizanthe stellulata is a species of flowering plant in the buckwheat family known by the common name starlet spineflower. It is endemic to California, where it grows in the dry woodlands of the low mountains and foothills along the central part of the state, such as the Sierra Nevada foothills. The plant takes an erect form, reaching up to 30 centimeters tall. The leaves are located at the base of the plant, and there is also a whorl of leaves at mid-stem. The inflorescence is a dense cluster of flowers, each flower surrounded by hairy, bristly white bracts tipped with hooked awns. The flower is 4 or 5 millimeters long and white to pink in color.

Chorizanthe uniaristata is a species of flowering plant in the buckwheat family known by the common name one-awn spineflower. It is endemic to central California, where it is known from several of the local mountain ranges, as well as the Central Coast. It grows in sandy, gravelly, and rocky soils in chaparral and woodland. This plant has upright or decumbent stems up to about 25 centimeters in length. It is hairy and gray, green, or reddish in color. The inflorescence is a cluster of flowers, with each flower surrounded by an array of six hairy bracts. One bract is much longer than the others and has a long, straight awn; the other bracts have hooked awns. The flower is 2 or 3 millimeters long and usually white.

Chorizanthe valida is a rare species of flowering plant in the buckwheat family known by the common name Sonoma spineflower. It is endemic to West Marin, Marin County, California, where it is known from only one remaining natural population at Point Reyes National Seashore. It was thought to be extinct until 1980 when the Point Reyes population was discovered. Chorizanthe valida is a federally listed endangered species.

Chorizanthe ventricosa, common name Priest Valley spineflower, is a plant species endemic to a small region in the Coastal Ranges of west-central California. It is found only on serpentine outcrops in grasslands and pine-oak woodlands at elevations of 500-1000 m. It has been reported from 4 counties: Monterey, San Benito, Fresno and San Luis Obispo. Chorizanthe ventricosa is an herb up to 70 cm tall, forming large spreading colonies. Leaves are up to 5 cm long. Flowers are formed in clusters up to 6 cm across, with green bracts with pointed tips giving the impression of spines. Flowers are 2-colored, white or yellow plus red or maroon.

Chorizanthe watsonii is a species of flowering plant in the buckwheat family known by the common name fivetooth spineflower. It is native to the western United States from Washington to the Mojave Desert. It grows in many types of plant communities from desert scrub to woodland and sagebrush. This small plant grows a woolly erect stem up to about 15 centimeters tall. The inflorescence is a cluster of flowers surrounded by five hairy greenish bracts tipped with hooked awns. The flower is about 2 millimeters wide and yellow in color.

Chorizanthe wheeleri is a rare species of flowering plant in the buckwheat family known by the common names Santa Barbara spineflower and Wheeler's spineflower. It is endemic to Santa Cruz and Santa Rosa Islands, two of the Channel Islands of California. It resembles the closely related plant known as Turkish rugging (Chorizanthe staticoides) and any reported mainland occurrences are actually specimens of this much more common species.

Chorizanthe xanti is a species of flowering plant in the buckwheat family known by the common name Riverside spineflower. It is endemic to California, where it grows in several of the mountain ranges from the Sierra Nevada to the Southern California Transverse Ranges in forest, woodland, and scrub habitats. Chorizanthe xanti is generally erect in form, reaching up to about 30 centimeters in height, and reddish in color and coated in thin to dense hairs. The inflorescence is a loose cluster of flowers, each flower surrounded by six reddish, curly-haired bracts tipped with hooked awns. The flower is up to 6 millimeters wide and pink to red in color. There are two varieties of this species. Chorizanthe xanti is generally erect in form, reaching up to about 30 centimeters in height, and reddish in color and coated in thin to dense hairs. The inflorescence is a loose cluster of flowers, each flower surrounded by six reddish, curly-haired bracts tipped with hooked awns. The flower is up to 6 millimeters wide and pink to red in color. There are two varieties of this species. The rarer, var. leucotheca, is known only from the San Jacinto and San Bernardino Mountains. It has a much more thickly woolly inflorescence than the more common variety.

Chrysolepis chrysophylla is a species of flowering plant in the beech family known by the common names golden chinquapin, giant chinquapin, and western chinquapin. It is native to the Pacific coast of the United States from west-central Washington to central California. This plant is a shrub or tree. Shrubby forms of the plant occur in dry areas, higher elevations, and poor soils. The plant grows into a tree up to 45 metres (148 ft) tall in cooler, moister areas such as valley bottoms and north-facing slopes, and foggy and rainy areas. The bark is thin and smooth on young trunks; on older specimens it becomes thicker and platy. The open crown of the large tree is conical in shape. The leathery evergreen leaves are dark green on the upper sides and golden underneath. The leaves are folded upward along the midrib. The species is monoecious, with individuals bearing both male and female flowers. White male flowers are borne in the leaf axils, and a cluster of female flowers is borne beneath them. A spiny bur contains one to three nuts. There is generally a burl at the base of the tree. The tree may sprout from adventitious buds in the burl, a form of vegetative reproduction that is more common in dry areas where it is less likely that seedlings would become established. The tree may live up to 500 years.

Golden Chinquapin (Chrysolepis chrysophylla var. chrysophylla) is a native tree or shrub that grows in central and northern California. It is moderately fast growing and long-lived. It grows in an upright form to a height of 100 feet, with active growth during the spring and summer. Flowers are yellow and bloom in the mid spring. Leaves are medium green, and remain on the plant throughout the year. It tends to grow at elevations from 0-6600 feet.

Giant Chinquapin (Chrysolepis chrysophylla var. minor) is a native tree or shrub that grows in central and northern California. It tends to grow at elevations from 0-5900 feet.

Bush Chinquapin (Chrysolepis sempervirens) is a native shrub that grows in northern, southern and central California. It is slow growing and moderately long-lived. It grows in a semi-upright form to a height of 7 feet, with active growth during the spring and summer. Flowers are green and bloom in the mid summer. Leaves are medium green, and remain on the plant throughout the year. It tends to grow in rocky slopes, at elevations from 2500-11000 feet.

Horticultural selection from Chrysopsis villosa var. bolanderi.

Chrysosplenium glechomifolium (also, C. glechomaefolium) is a species of flowering plant in the saxifrage family known as the Pacific golden saxifrage. This plant is native to the moist coastline of western North America from British Columbia to northern California. It is a small plant with lush green foliage, bearing rounded, dully-toothed leaves and shiny green leaflike flowers. It is an uncommon plant which grows in swamps and forest understory and in the shade of taller plants.

Long Flowered Rabbitbrush (Chrysothamnus depressus) is a native shrub that grows in Southern California, primarily in the Desert Mountains and Mojave Desert regions. It tends to grow in rocky crevices, at elevations from 3300-6900 feet.

Chrysothamnus greenei called Greene' rabbitbrush , is a North American species of flowering plants in the aster tribe within the sunflower family. It has been found in eastern California (Mono + Inyo Counties), Nevada, Arizona, New Mexico, Utah, Colorado, and southern Wyoming (Sweetwater County). Chrysothamnus greenei is a branching shrub up to 50 cm (20 inches) tall with gray bark. It has many small, yellow flower heads clumped into dense arrays. The species grows in sandy locations in desert regions.

Chrysothamnus viscidiflorus is a species of shrub in the daisy family known by the common names yellow rabbitbrush and green rabbitbrush. It is native to western North America, from British Columbia to California to Nebraska, where it grows in sagebrush and woodland habitat. It grows easily in alkaline and saline soils, and thrives on soils that are rich in calcium. It rapidly establishes in disturbed habitat, including burns, flooded washes, and rockslides, so it is a valuable shrub for revegetating damaged land such as overgrazed rangeland and abandoned mining areas. This shrub grows up to about 1.5 meters in height with spreading brittle pale-colored stem branches. The leaves are up to a few centimeters long and may be thin and thready or up to a centimeter wide and oblong in shape. They are hairy, resinous, and sticky. The flower cluster is a bushy cluster of flower heads, each head one half to one centimeter long. The flower head is lined with sticky yellow-green phyllaries and contains several yellowish protruding flowers. The fruit is a hairy achene a few millimeters long with a wispy pappus at the tip.

Chylismia brevipes is a species of wildflower in the Onagraceae (Evening Primrose) family that is native to the American desert southwest. It is known by the common names Yellow Cups, Mojave Suncup, and Golden Suncup. This is a hairy annual with tall stems often reaching over half a meter in height and surrounded by basal leaves which may be simple or composed of several leaflets. It produces an flower cluster which has one to several blooms in it. The flowers are bright yellow, often with reddish speckling at the base of each petal. The center of the flower has a long pistil and several shorter stamens with large anthers. The fruits are hanging capsules which may be several centimeters long.

Golden Suncup (Camissonia brevipes ssp. brevipes) is a native annual herb that grows in Southern and Central California, primarily in the Desert Mountains, the Mojave Desert and Sonoran Desert regions. It tends to grow in sandy or rocky slopes, at elevations from 0-5900 feet.