Potentilla gracilis, known as Slender Cinquefoil, or Graceful Cinquefoil is a species of cinquefoil. Named varieties are:

Potentilla gracilis, known as slender cinquefoil or graceful cinquefoil, is a species of cinquefoil. Named varieties are:

Potentilla grayi is a species of cinquefoil known by the common name Gray's cinquefoil. Potentilla grayi is endemic to the Sierra Nevada of California, where it grows in high mountain meadows.

Potentilla hickmanii (called Hickman's potentilla or Hickman's cinquefoil) is an endangered perennial herb of the rose family. This rare plant species is found in a narrowly restricted range in two locations in coastal northern California, in Monterey County, and in very small colonies in San Mateo County. This small wildflower, endemic to western slopes of the outer coastal range along the Pacific Ocean coast, produces bright yellow blossoms through spring and summer. This species was formerly thought to be growing in Sonoma County but that population has been recently reclassified as another species, Potentilla uliginosa and is presumed extinct in that county.

Potentilla millefolia is a species of cinquefoil known by the common names cutleaf cinquefoil and feather cinquefoil. It is native to Oregon, Nevada and eastern California, where it grows in moist mountain meadows and similar habitat. The plant produces a basal rosette from a taproot, then a decumbent stem up to about 20 centimeters in maximum length. The elongated leaves are made up of several overlapping pairs of deeply lobed leaflets. The inflorescence at the tip of the stem is a cyme of a few flowers, each with usually five yellow petals under a centimeter long.

Potentilla morefieldii is a species of cinquefoil known by the common name Morefield's cinquefoil. It is endemic to eastern California, where it is known from just a few occurrences in the White Mountains. It grows in rocky habitat such as talus in alpine climates. This cinquefoil was considered part of the Potentilla drummondii complex until 1992, when it was separated and elevated to species status. This is a small tufted plant with hairy or woolly foliage. The leaves are each made up of several overlapping pairs of lobed leaflets which are green and rough-haired on the upper surfaces and white and woolly-haired underneath. The inflorescence is a cyme of up to 15 flowers with bright yellow petals.

Potentilla newberryi is a species of cinquefoil known by the common name Newberry's cinquefoil. It is native to the Pacific Northwest of the United States from Washington to the northeastern Modoc Plateau in California and Nevada. It grows in moist habitat, particularly drying areas such as receding vernal pools and evaporating puddles. It is a dominant plant in many kinds of local habitat, such as sagebrush and juniper woodlands. The Potentilla newberryi plant may be annual or perennial. It grows from a taproot and produces a basal rosette of leaves. The hairy leaves are made up of a few overlapping pairs of deeply lobed leaflets. The inflorescence is a cyme of several flowers, each with usually five white petals a few millimeters long.

Potentilla pensylvanica is a species of cinquefoil known by the common names Pennsylvania cinquefoil and prairie cinquefoil. It is native to much of northern and western North America, including most of Canada and the western half of the United States. It grows in many types of habitat. The plant is quite variable in appearance. It may be small and tuftlike or slender and erect. The leaves are divided into a few leaflets which are deeply lobed and have hairy undersides. The inflorescence is a clustered of several flowers each with yellow petals a few millimeters in length.

Potentilla pseudosericea is a species of cinquefoil known by the common names silky cinquefoil and Mono cinquefoil. It is native to the Sierra Nevada of California and mountain ranges just to the east, where its distribution extends into Nevada. It grows in rocky mountainous habitat. It is a small plant forming mats or tufts in rock cracks and talus, its short stem growing from a caudex. The leaves are generally palmate, divided into five leaflets. The leaflets are deeply lobed along the edges and woolly in texture, coated in white or silvery hairs. The inflorescence is a cluster of a few yellow flowers with petals around 3 millimeters long each.

Potentilla rimicola is a species of cinquefoil-Potentilla, known by the common name cliff cinquefoil. It is native to the San Jacinto Mountains in Riverside County of the Peninsular Ranges in Southern California where it is known from just a few occurrences, and to Baja California. As its name suggests, it has been observed growing on cliff faces, its taproot anchoring in cracks in granite rock and its foliage hanging. Potentilla rimicola leaves are borne on long petioles, their palmate blades each divided into five toothed leaflets. The inflorescence is a cluster of up to 20 flowers, each with five yellow petals under a centimeter in length.

Potentilla rivalis is a species of cinquefoil known by the common names brook cinquefoil and river cinquefoil. It is native to much of North America, including the southern half of Canada and the western and central United States. It grows in moist habitat, sometimes in disturbed areas. It is an annual or biennial herb producing upright stems up to half a meter tall from a taproot. The hairy leaves are divided into three to five leaflets which are lance-shaped to oval and lined with teeth. The inflorescence is a cluster of several flowers with tiny yellow petals no more than 2 millimeters long on a calyx of pointed sepals and bractlets which are slightly longer.

Potentilla wheeleri is a species of cinquefoil known by the common name Kern cinquefoil or Wheeler's cinquefoil. It is native to the Sierra Nevada and nearby ranges of California and it has been reported from Arizona and Baja California. Its habitat includes moist areas in mountainous regions. This tuftlike plant produces spreading, decumbent stems with leaves sometimes arranged in a rosette about the caudex. The hairy stems reach a maximum length near 25 centimeters. The rough-haired leaves are palmate, each divided into five wedge-shaped leaflets which are lined or tipped with teeth. The inflorescence is a cyme of several flowers with yellow petals each a few millimeters long.

Prenanthella is a monotypic genus of flowering plants in the daisy family containing the single species Prenanthella exigua, which is known by the common name brightwhite. It is native to the southwestern United States from California to Texas and it is known as far north as Idaho. Its habitat includes desert and woodlands. This annual herb produces a slender, branching stem reaching a maximum height near 40 centimeters. It has a sparse coating of glandular hairs and contains a milky juice. Most of the leaves are located near the base of the stem. They are widely lance-shaped and sometimes divided into segments. Smaller leaves occur higher on the stem; these may be reduced to scale-like structures, leaving the stem mostly bare. The inflorescence is a wide open panicle of several flower heads. Each small head is cylindrical and narrow, its base wrapped in lance-shaped phyllaries. At the tip of the head bloom 3 or 4 flowers, which are ray florets; there are no disc florets. Each floret has is white to pale pink and has a toothed tip. The fruit is a white achene with a pappus of white bristles.

Dodecatheon clevelandii is a species of Dodecatheon native to California and Baja California. Its common name is padre's shooting star. It is generally found in open grassy areas. It is spring deciduous, dying back to the ground after the rains cease. It has basal clumps of leaves up to 16 centimeters long with nodding flowers each about an inch long on stems up to a foot tall. The flowers are magenta to deep lavender to white. This species hybridizes with Dodecatheon hendersonii, from which it can be distinguished by its green stem.

Cleveland's shooting star is the only plant in the Primula genus that is found in San Diego County.

Padre's Shootingstar (Dodecatheon clevelandii ssp. sanctarum) is a native perennial herb that grows in northern, southern and central California. It tends to grow in grassy places, at elevations from 0-2000 feet.

Shooting Star (Dodecatheon clevelandii ssp. insulare) is a native perennial herb that grows in Southern and Central California, primarily in the South Coast Range, the South Coast and Channel Islands regions. It tends to grow in grassy places, at elevations from 0-2000 feet.

Shooting Star (Dodecatheon clevelandii ssp. patulum) is a native perennial herb that grows in northern, southern and central California. It tends to grow in grassy slopes, at elevations from 0-2000 feet.

Dodecatheon conjugens is a species of flowering plant in the primrose family known by the common name Bonneville shooting star. This wildflower is native to western North America from California to Saskatchewan where it grows in seasonally wet areas from sagebrush steppe to high mountains. This is a thick-rooted perennial with narrow oval-shaped leaves around the base. It erects slim, tall stems which are dark in color and are topped with flower clusters of one to seven showy flowers. Each flower nods with its mouth pointed to the ground when new, and becomes more erect with age. It has five reflexed sepals in shades of magenta or white which lie back against the body of the flower. At the sepal bases is a ring of bright yellow. From the corolla mouth protrude large dark red or black anthers surrounding a threadlike pink stigma.

Dodecatheon redolens is a species of flowering plant in the primrose family known by the common name scented shooting star. This wildflower is native to western North America from California to Utah, where it grows in moist areas, especially in mountains. This is a hairy, thick-rooted perennial with long, clumping leaves around the base. It erects slim, tall, hairy stems which are dark in color and are topped with flower clusters of 5 to 10 showy flowers. Each flower nods with its mouth pointed to the ground when new, and becomes more erect with age. It has five reflexed sepals in shades of pink, lavender, or white which lie back against the body of the flower. Each sepal base has a blotch of bright yellow and is folded into a thick lip around the mouth of the flower. From the corolla mouth protrude large anthers which may be light pink to nearly black surrounding a threadlike stigma.

Dodecatheon hendersonii is a species of Dodecatheon native to western North America, from California north to southern British Columbia and Idaho. In California, it occurs in the northwest (except the north coast), the Cascade Range, the Sierra Nevada foothills, the Central Valley, the San Francisco Bay Area, the north Inner South Coast Ranges, and the San Bernardino Mountains. It is generally found in open woodlands, from sea level in British Columbia, up to 1900 meter altitude in California. Common names include broad-leaved shooting star, Henderson's shooting star, mosquito bills, and sailor caps. D. hendersonii is summer deciduous, dying back to the ground after the rains cease. It has basal clumps of leaves, 2-16 centimeter, with nodding flowers 6-25 millimeter long on stems 10-30 centimeter tall. The flowers are magenta to deep lavender to white, with the stamens are thrust out and the sepals bent back. It is highly variable and hybridizes with Dodecatheon clevelandii, from which it can be distinguished by its reddish or purplish stem.

Dodecatheon jeffreyi is a species of flowering plant in the primrose family known by the common names Sierra shooting star, Jeffrey's shooting star, and tall mountain shooting star. This wildflower is native to western North America from California to Alaska to Montana, where it grows in mountain meadows and streambanks. This is a thick-rooted perennial with long, slightly wrinkled leaves around the base. It erects slim, tall, hairy stems which are dark in color and are topped with flower clusters of 3 to 18 showy flowers. Each flower nods with its mouth pointed to the ground when new, and becomes more erect with age. It has four or five reflexed sepals in shades of pink, lavender, or white which lie back against the body of the flower. Each sepal base has a blotch of bright yellow. From the corolla mouth protrude large dark anthers surrounding a threadlike stigma. The flowers of this species were considered good luck by the Nlaka'pamux people, who used them as amulets and love charms.

Dodecatheon pulchellum, commonly known as pretty shooting star, few-flowered shooting star, dark throat shooting star and prairie shooting star, is a perennial herb with single, leafless flower stems, growing from very short erect root stocks with no bulblets. It grows to a height of 5 to 40 centimeters. Its leaves are basal, 2-15 centimeter long, blades oblong-lance-shaped to oblance-shaped, mostly entire to somewhat small-toothed, narrowed gradually to winged stalks nearly as long.

Primula suffrutescens is a species of primrose known by the common name Sierra primrose. Primula suffrutescens is a subshrub growing from a sturdy anchoring rhizome. It has a matlike form with a thick, woody base covered in the dried remnants of previous seasons' herbage. The green leaves occur in several rosettes on the woody base. The hairless leaves are spoon-shaped with jagged, toothed tips and measure up to 3. 5 centimeters long. It is endemic to California, where it grows in the high mountains of the Sierra Nevada and Klamath Ranges. It grows in rock cracks, blooming in July and August. Primula suffrutescens is a subshrub growing from a sturdy anchoring rhizome. It has a matlike form with a thick, woody base covered in the dried remnants of previous seasons' herbage. The green leaves occur in several rosettes on the woody base. The hairless leaves are spoon-shaped with jagged, toothed tips and measure up to 3. 5 centimeters long. From the rosettes arise inflorescences on peduncles up to 12 centimeters tall. The showy inflorescence is an umbel of several flowers with tubular yellow throats and flat magenta corollas with five jagged or notch-tipped lobes. The fruit is a capsule. Distribution and habitat. It is endemic to California, where it grows in the high mountains of the Sierra Nevada and Klamath Ranges. It grows in rock cracks, blooming in July and August.

Dodecatheon alpinum is a species of flowering plant in the primrose family known by the common name alpine shooting star. This wildflower is native to the southwestern United States where it grows in wet areas in mountains. It is partially aquatic, sometimes growing along the edges of bogs and in shallow, slow rivulets. This is a thick-rooted perennial with narrow, straight leaves around the base. It erects slim, tall stems which are dark in color and are topped with flower clusters of one or more showy flowers. Each flower nods with its mouth pointed to the ground when new, and becomes more erect with age. It has four reflexed sepals in shades of bright pink or lavender which lie back against the body of the flower. These may have bases of white or yellow which rim the corolla. From the corolla mouth protrude large black anthers and a thready stigma.

Proboscidea althaeifolia is a species of flowering plant in the family Martyniaceae known by the common names desert unicorn-plant and yellow-flowered devil's claw. It is native to the desert southwest of the United States, where it grows in sandy habitat and blooms during the hot summer. This is a perennial herb growing from a thick, tuberlike yellow root. The stem is decumbent, creeping along the ground. The shiny leaves have rounded, oval, or roughly triangular blades up to 7 centimeters long which are deeply lobed and wavy along the edges. The inflorescence is an array of many showy, fragrant, bell-shaped flowers with five lobes flaring several centimeters wide. The flower is yellow to orange or apricot with an intricate pattern of speckles and streaks, its lower lobe lined with a nectar guide. The fruit is a large seed pod many centimeters long, a cylindrical body tapering into a very long, thin, curving tail. As the fruit dries the tail cracks open and splits into two hooked, claw-like halves. These hard, dry fruits were used as tools by local Native Americans.

Proboscidea parviflora is a species of flowering plant in the family Martyniaceae known by the common names doubleclaw and red devil's-claw. It is native to the desert southwest of the United States and northern Mexico, where it grows in sandy, dry, and disturbed habitat and blooms during the hot summer. This is an annual herb growing from a taproot and producing sprawling, spreading stems. The leaves have rounded, oval, or roughly triangular blades up to 15 centimeters long which have smooth edges or faint lobes or teeth. The inflorescence is an array of several showy bell-shaped flowers with five lobes flaring several centimeters wide. The flower is white to pink or purple, sometimes with mottling or lines of spots in the throat, and often a purple blotch on the upper lip. A yellow nectar guide extends along the lower lip. The fruit is a large seed pod many centimeters long, a cylindrical body tapering into a very long, thin, curving tail. As the fruit dries the tail cracks open and splits into two hooked, claw-like halves. The young fruits and seeds were used for food and the dark-colored hardened dry fruits were used in basketry local Native Americans.

Prosartes hookeri is a North American species of flowering plants in the lily family known by the common names drops of gold and Hooker's fairy bells.
It is native to western North America from Alberta and British Columbia to California to Montana, where it usually grows in shady, damp areas, such as forest understory. Additional populations have been found in the Black Hills of Wyoming and South Dakota as well as in the Porcupine Mountains in Michigan. A typical west coast habitat is in forest floors of California oak woodlands, where common understory flora associates may include Coastal woodfern, Dryopteris arguta; Maidenhair fern, Adiantum jordanii and False Solomon's seal, Maianthemum racemosum.
It is an erect, few-branched perennial herb growing up to a meter tall from a rhizome. Its narrow, fuzzy stems bear wide, oval-shaped, pointed leaves up to 15 centimeters long and hairless to hairy, often with hairs along the edges and on the veins underneath. The inflorescence at the tips of branches produce one to three drooping, hanging flowers which may be hidden in the cover of the large leaves. The flower is bell-shaped with six white to green veiny tepals and six protruding stamens with large anthers. The fruit is an orange to bright red berry just under a centimeter wide.

Prosartes parvifolia (Siskiyou bells) is a rare plant species endemic to a small region in the Siskiyou Mountains of the United States. It is known from only 4 counties: 2 in California (Del Norte and Siskiyou) and 2 in Oregon (Curry and Josephine). The species has been considered by some authorities as part of P. hookeri but others accept Prosartes parvifolia as a separate species. Prosartes parvifolia is a rather stout plant with densely hairy ovate leaves. It can be distinguished from P. hookeri because P. parvifolia has single-locule ovaries and anthers much longer than the filaments.

Prosartes smithii, formerly Disporum smithii, is a species of flowering plant in the Colchicaceae known by the common name largeflower fairybells. It is native to western North America from British Columbia to northern California, where it grows in shady forest and woodland, including forests. It is an erect, branching perennial herb growing up to a meter tall. Its narrow, fuzzy stems bear wide, oval-shaped, pointed leaves up to 12 centimeters long and mostly hairless. The flower cluster produces up to seven drooping, hanging flowers which may be hidden in the cover of the large leaves. The flower is cylindrical to bell-shaped with six white to green-tinged petals each up to 3 centimeters long. The fruit is an oval-shaped orange or red berry just over a centimeter long.

Prunella vulgaris, known as common selfheal, heal-all, heart-of-the-earth or h kh tho in Vietnamese, is a medicinal plant in the genus Prunella. It grows from 1 to 2 feet high, with creeping, self-rooting, tough, square, reddish stems branching at leaf axis. The leaves are lance shaped, serrated and reddish at tip, about an inch long and 1/2 inch broad, grow on short stalks in opposite pairs down the square stem. The flowers grow from a clublike, somewhat square, whirled cluster, immediately below this club are a pair of stalkless leaves standing out on either side like a collar. Flowers are two lipped and tubular, the top lip is a purple hood, and the bottom lip is often white, it has three lobes with the middle lobe being larger and fringed upwardly. Flowers bloom at different times depending on climate and other conditions; Mostly from June to August. For medicinal purposes, the whole plant is gathered when the flowers bloom, and dried. The leaves and small flowers of heal-all are edible. Heal-all is a perennial herb found throughout Europe, Asia, Japan and the United States of America, as well as most temperate climates. Its origin seems to be European, though it has been documented in other countries since before any history of travel. In the United Kingdom it is abundant throughout Wales, Scotland, Northern Ireland and England. In the Republic of Ireland it is currently abundant in the west in counties Galway and Clare, the south-west in Kerry, the south coast and is also found around the central basin of Ireland. It is often found growing in waste ground, grassland, woodland edges, usually on basic and neutral soils. It is grown in any damp soil in full sun or in light shade. Seeds are sown in very early spring in a flat outdoor area.

Lance Leaf Self Heal (Prunella vulgaris var. lanceolata) is a native perennial herb that grows in northern, southern and central California. It tends to grow in wet places, at elevations from - feet.

Hybrid of Prunus ilicifolia ssp. ilicifolia (Hollyleaf Cherry) and P. ilicifolia ssp. lyonii (Catalina Cherry). Tolerates almost any soil type. Prefers sun in coastal sites, and sun or part shade in inland sites. Selected for use in the garden.

Prunus andersonii is a species of shrub in the rose family, part of the same genus as the peach, cherry, and almond. Its common names include desert peach and desert almond. It is native to eastern California and western Nevada, where it grows in forests and scrub in desert and mountains. Prunus andersonii is a shrub approaching two meters (80 inches) in height, its tangling branches narrowing to spiny-tipped twigs. Serrated, lance-shaped to oval leaves occur in clusters, each leaf measuring up to 3 centimeters (1. 2 inches) long. The shrub is deciduous. The inflorescence is a solitary flower or pair of flowers. Each flower has usually five concave pink petals each just under a centimeter (0. 4 inches) long, with many whiskerlike stamens at the center. Flowers bloom before or at the same time as the leaves appear. The fruit is a fuzzy reddish-orange drupe around a centimeter (0. 4 inches) wide. The fruits are fleshy in years with ample moisture, and dry in drought years. The seed is a heart-shaped stone. The plant reproduces sexually via germination of the seed, and vegetatively by sprouting from its rhizome. One plant may sprout and resprout from its rhizomes to form a very large clone which can spread over several acres.

Oregon cherry or Bitter cherry (Prunus emarginata) is a species of Prunus native to western North America, from British Columbia south to California, and east to western Wyoming and Arizona. It is often found in recently disturbed areas, open woods, on nutrient-rich soil. It is a deciduous shrub or small tree growing to 1-15 meter tall with a slender oval trunk with smooth gray to reddish-brown bark with horizontal lenticels. The leaves are 2-8 centimeter long, thin, oval-shaped, and yellowish-green with unevenly-sized teeth on either side. The flowers are small, 10-15 millimeter diameter, with five white petals and numerous hairlike stamens; they are almond-scented, and produced in clusters in spring, and are pollinated by insects. The fruit is a juicy red or purple cherry 7-14 millimeter diameter, which, as the plant's English name suggests, are bitter. As well as reproducing by seed, it also sends out underground stems which then sprout above the surface to create a thicket.

Prunus eremophila is a rare species of plum that is known by its common name Mojave Desert plum. It is endemic to San Bernardino County, California, where it is known only from the Vontrigger Hills of the eastern Mojave National Preserve, including Lanfair Valley. It occurs in Mojave Desert scrub habitat. The plant was described to science only in 2001 or 2002 and little is known about its ecology. This is a bulky shrub with tangled, thorny branches. It reaches over two meters in maximum height.

Prunus fasciculata (syn. Emplectocladus fasciculata (Torr.); Desert almond) is a perennial deciduous shrub native to the deserts of Arizona, California, Nevada and Utah. It prefers sandy or rocky soil on dry slopes and washes up to 2200 meter. of altitude. It grows up to two meters high, exceptionally larger, with divaricately branching, spinescent, lightly thorned branches, often in thickets. The bark is grey and smooth. The leaves are 5-10 millimeter long, spatulate, oblance-shaped, linear, arranged on very short petioles in fascicles, or bundles. The flowers are small and white with 3 millimeter; petals, occurring either solitary or in fascicles and are subsessile growing from the leaf axils. They are dioecious. Male flowers have 10-15 stamens; female, one or more pistils. The plant displays numerous fragrant flowers from March to May, which attract the bees that pollinate it. The drupe is about 1 centimeter long, ovoid, light brown and hairy with thin flesh.

Prunus fremontii is a North American species of plants in the rose family, known by the common name desert apricot. It takes its scientific name from John C. Frémont. It is found in northern and western Baja California especially, mostly Pacific and western, and the adjacent area of southern California. It also occurs in northern Baja California Sur. Prunus fremontii is a deciduous shrub or small tree reaching up to five meters (16 2/3 feet) in height. Flowers are white or pink, blooming about the same time as the leaves unfurl in the Spring. Fruits are yellow and egg-shaped.

Hollyleaf cherry or Evergreen cherry is a species in the Rosaceae (Rose) family that is native to coastal California and northern Baja California. It is an evergreen shrub or small tree up to 15 meters tall, with dense, sclerophyllous foliage. The leaves are 1.6-12 centimeter long with a 4-25 millimeter petiole and spiny margins, somewhat resembling those of the holly, hence its English name; they are dark green when mature and generally shiny on top, and have a smell resembling almonds when crushed. The flowers are small (1-5 millimeters), white, produced on racemes in the spring. The fruit is a cherry 12-25 millimeter diameter, edible and sweet, but contains little flesh surrounding the smooth seed. Great for birds.

There are two recognized subspecies; ssp. lyonii (commonly known as Catalina Island Cherry) is native to the Channel Islands. It was formerly considered a separte species, and it is very similar in appearance and genetics to other P. ilicifolia. They hybridize readily, and many plants sold in nurseries may be unintentional hybrids.

Hollyleaf Cherry (Prunus ilicifolia ssp. ilicifolia) is a native evergreen tree or shrub in the Rose family that grows in the coastal and inland valleys strip of northern, central, and southern California. It tends to grow on slopes or in valleys, at elevations from 0-5200 feet. It grows in chaparral, coastal sage scrub, and southern oak woodland habitats and can vary greatly in size depending on conditions. In dry, rocky or shallow soils it will be bush-like from 5 to 15 ft. In richer soils with more moisture it will attain large shrub or small tree size, up to 30-40 ft.
The leaves are holly-like and evergreen. The flowers are small and white; the fruit is a one inch red to dark purple drupe that is popular with wildlife. The closely related subspecies Prunus ilicifolia ssp. lyonii (Catalina Cherry) is endemic to the Channel Islands, but in appearance and behavior the two can be difficult to distinguish as they hybridize readily.

Catalina cherry (Prunus ilicifolia ssp. lyonii) is a lovely evergreen shrub with shiny soft leaves and dark cherry colored fruit.  In late spring, striking white flowers appear. Older trees may resemble coast live oak.

As a native plant, it grows in chaparral woodland, primarily in the Channel Islands region.

The edible fruits are favored by birds and other wildlife. 

Catalina cherry can be planted as a hedge because its dense vegetation creates a good screen. It is fairly easy to grow and will tolerate garden conditions, with summer watering once or twice a month. It is fast growing once established and moderately long-lived.  Fallen fruits may stain concrete paving, if any is nearby. 

Klamath plum, also called Oregon plum, or Sierra plum (Prunus subcordata) is a member of the genus Prunus (plum, cherry, and other stone fruit), native to the west coast of the United States in California and southern Oregon. It grows in forests, most often at low elevation near the coast, but it is also in the Sierra Nevada and Cascades; it grows at altitudes of 100-1,900 meter. It is an erect deciduous shrub or small tree growing to 8 meter in height. It sprouts from its roots and can form dense, spiny thickets. The bark is gray with horizontal brown lenticels, similar in appearance to that of the cherry tree. The leaves are 2.5-5 centimeter long with a 4-15 millimeter petiole, dark green, turning red before falling, and are faintly serrated. The flowers are pink or white, appearing in the spring in clusters of one to seven together. The fruit is a small plum-like drupe, variable in appearance, 15-25 millimeter in length, and may be red or yellow; they are mature in late summer. The plums are small and tart but edible.

Klamath Plum (Prunus subcordata var. subcordata) is a native tree or shrub that grows in central and northern California. It tends to grow at elevations from 0-6000 feet.

Choke Cherry (Prunus virginiana) is a species in the Rosaceae (Rose) family, in the Bird Cherry (Padus) subgenus. It is native to North America where it is found almost throughout the continent except for the deep south and the far north. The plant is widespread in California, particularly in the mountains. It is a suckering shrub or small tree growing to 5 meter tall. The leaves are oval, 3-10 centimeter long, with a coarsely serrated margin. It is deciduous, and the leaves provide some fall color. The flowers are produced in racemes of 15-30 inches late spring (well after leaf emergence). The fruits are about 1 centimeter diameter, range in color from bright red to black. Although they are said to be edible, they contain small amounts of cyanide, especially when unripe. The very ripe berries are dark in color, less astringent, and contain less cyanide. Despite the potential toxicity, the fruits were valued by many Native people.

Western Chokecherry (Prunus virginiana var. demissa) is a native tree or shrub that grows in northern, southern and central California. It is fast growing and short-lived. It grows in an upright form to a height of 20 feet, with active growth during the spring and summer. Flowers are white and striking, and bloom in the spring. Leaves are medium green and deciduous. It tends to grow in rocky slopes, at elevations from 0-8200 feet.

Psathyrotes annua is a species of flowering plant in the aster family known by the common name annual psathyrotes. It is native to the southwestern United States and as far north as Idaho. It grows in desert and scrub habitat, often in areas with alkali soils among plants such as shadscale. It is a low, flat or mounding plant with spreading, hairy, scaly stems. It is pale green to reddish purple in color with gray-green leaves, its color dull from the coating of fibers on its surface. The irregularly rounded leaf blades are up to 1. 6 centimeters long with wavy or toothed edges. The knobby inflorescence arises from the leaf axils. It is lined with hairy gray-green phyllaries with dull points that curve outward. It contains several hairy yellow to reddish disc florets. The fruit is an achene covered densely in long hairs and tipped with a large pappus of bristles.

Psathyrotes ramosissima is a species of flowering plant in the aster family known by the common name velvet turtleback, or turtleback. It is native to the southwestern United States where it grows in desert scrub habitat. It is a low, neatly mounded plant producing spreading stems which are hairless to densely woolly in texture. Leaves are borne on long petioles. The leaf blade is variable in shape, generally roughly rounded, and up to 2 centimeters long. It has a wavy, bluntly toothed edge and a bumpy, velvety surface coated in woolly fibers and shiny hairs. It is brownish to gray-green to very pale green in color. The knobby inflorescence is lined with woolly gray-green phyllaries with dull points that curve outward. It contains several hairy yellow disc florets. The fruit is an achene tipped with a large pappus of over 100 long, fine bristles.

Pseudobahia bahiifolia is a rare species of flowering plant in the aster family known by the common name Hartweg's golden sunburst. Pseudobahia bahiifolia is endemic to California, where it is known from a few small occurrences along the eastern side of the Central Valley and the lower central Sierra Nevada foothills. It grows in grassland and oak woodland habitat. It prefers heavy clay soils, particularly along the tops of Mima mounds. The plant's native range is on land that has been heavily altered by agriculture, leaving little habitat intact, and the plant became a federally listed endangered species of the United States in 1997. This species, Pseudobahia bahiifolia, is an annual herb growing 5 to 20 centimeters tall. It has a thin coating of woolly hairs. The linear or lance-shaped leaves are up to 2. 5 centimeters long and often have three small lobes near the tips. The inflorescence is a solitary sunflowerlike flower head lined with three to eight phyllaries. There is one golden ray floret per phyllary, up to a centimeter in length and sometimes faintly toothed at the tip. At the center of the head are yellow disc florets. The blooming period is 3 to 4 weeks long, occurring in March and April. The fruit is an achene about 2 millimeters long. Endangered. The main threat to its remaining populations is destruction of its habitat for residential development. About 90% of all individuals of this species occur in two main locations, one of which was scheduled to be cleared for housing construction when the plant was listed as an Endangered species.