Polygonum majus is a North American species of flowering plant in the buckwheat family known by the common name Wiry knotweed. It grows in the western United States and western Canada, from British Columbia south as far as the Sierra Nevada of northwestern Inyo County in California, east as far as Montana. Polygonum majus is an herb up to 60 cm (2 feet) tall. Stems are thin and wiry. Flowers are white or pink

Polygonum marinense is a rare North American species of flowering plants in the buckwheat family known by the common name Marin knotweed. It is endemic to California, where it is known from just a few locations north and east of San Francisco Bay. The taxonomy of the plant is uncertain. It has been suggested that the species may be native to the Mediterranean, and that the California specimens may actually be introduced. If, however, it is a true Bay Area endemic, the plant is rare and threatened by habitat destruction and disturbance. It is a resident of salt marsh and other wet coastal habitat.

Polygonum minimum is a species of flowering plant in the knotweed family known by the common name broadleaf knotweed. It is native to much of western North America where it can be found in mountainous regions. It grows in the subalpine and alpine climates of high mountain ranges from Alaska to Arizona and New Mexico. Polygonum minimum is an annual herb producing slender, stiff, zigzag-angled reddish stems up to 30 centimeters (1 foot) long, growing prostrate or erect. The leaves are lance-shaped to widely oval or nearly round and are located all along the stems but most crowded near the tips. Inflorescences occur in the leaf axils, each bearing one or more five-lobed white flowers. Polygonum minimum is an annual herb producing slender, stiff, zigzag-angled reddish stems up to 30 centimeters (1 foot) long, growing prostrate or erect. The leaves are lance-shaped to widely oval or nearly round and are located all along the stems but most crowded near the tips. Inflorescences occur in the leaf axils, each bearing one or more five-lobed white flowers.

Polygonum paronychia is a species of flowering plant in the knotweed family known by the common names dune knotweed, black knotweed, and beach knotweed. It is native to the coastline of western North America from British Columbia to California, where it grows in sandy coastal habitat such as beaches, dunes, and scrub. Polygonum paronychia is a small prostrate or upright shrub producing multibranched brown stems up to a meter (40 inches) long. The stems may root at nodes that come in contact with moist substrate. The leaves are alternately arranged on the stems but are mostly located bunched around the tips of the stem branches. The leaves are linear to lance-shaped with rolled edges and bristly midribs on the undersides. Each leaf has a large stipule which forms a wide, membranous ochrea. The ochrea is up to 2 centimeters (0. 8 inches) long and is persistent, fraying into fibrous, silvery shreds that remain on the plant through the seasons. Flowers occur in the leaf axils. Each is up to a centimeter (0. 4 inches) wide with five narrow white or pinkish corolla lobes. Polygonum paronychia is a small prostrate or upright shrub producing multibranched brown stems up to a meter (40 inches) long. The stems may root at nodes that come in contact with moist substrate. The leaves are alternately arranged on the stems but are mostly located bunched around the tips of the stem branches. The leaves are linear to lance-shaped with rolled edges and bristly midribs on the undersides. Each leaf has a large stipule which forms a wide, membranous ochrea. The ochrea is up to 2 centimeters (0. 8 inches) long and is persistent, fraying into fibrous, silvery shreds that remain on the plant through the seasons. Flowers occur in the leaf axils. Each is up to a centimeter (0. 4 inches) wide with five narrow white or pinkish corolla lobes.

Polygonum parryi is a species of flowering plant in the knotweed family known by the common names Parry's knotweed and prickly knotweed. It is native to the western United States from Washington to California, where it grows in several types of moist, open habitat in mountainous and coastal areas. Polygonum parryi is a small annual herb forming mats or cushions of short, angled stems growing erect up to 7 or 8 centimeters (2. 8-3. 2 inches) in height. The greenish brown stems are lined densely and evenly with linear, spine-tipped leaves. The lowest leaves are longest, reaching up to 2 centimeters (0. 8 inches) long, while leaves near the branch tips are small and scale-like. Each leaf has a thin, wide stipule which forms a fringed, fibrous ochrea around the base of the leaf. White flowers less than 2 millimeters (0. 08 inches) wide occur in the leaf axils. Polygonum parryi is a small annual herb forming mats or cushions of short, angled stems growing erect up to 7 or 8 centimeters (2. 8-3. 2 inches) in height. The greenish brown stems are lined densely and evenly with linear, spine-tipped leaves. The lowest leaves are longest, reaching up to 2 centimeters (0. 8 inches) long, while leaves near the branch tips are small and scale-like. Each leaf has a thin, wide stipule which forms a fringed, fibrous ochrea around the base of the leaf. White flowers less than 2 millimeters (0. 08 inches) wide occur in the leaf axils.

Polygonum polygaloides is a North American species of flowering plants in the buckwheat family known by the common names milkwort knotweed and polygala knotweed. It is native to much of western North America, where it can be found in many types of moist habitat. It is a variable species, usually divided into a number of subspecies. Polygonum polygaloides is an annual herb producing slender, wiry green stems 1 to 30 centimeters (0. 4-12 inches) in length. The linear or lance-shaped leaves are alternately arranged uniformly along the stem, the ones near the tips of stem branches highly reduced. The leaves have membranous stipules which fuse to form silvery ochrea at the leaf bases. The flowers are mainly located in clusters around the stem tips. They are white, pink, or red, and most remain closed. Subspecies. Some sources accept the following as subspecies of Polygonum polygaloides, while others regard all but subsp. polygaloides as belonging to a distinct species, P. kelloggii. Polygonum polygaloides subsp. confertiflorum (Nutt. ex Piper) J. C. Hickman - from British Columbia east to Saskatchewan and south as far as New MexicoPolygonum polygaloides subsp. esotericum (L. C. Wheeler) J. C. Hickman - California, OregonPolygonum polygaloides subsp. kelloggii (Greene) J. C. Hickman - from British Columbia to ArizonaPolygonum polygaloides subsp. polygaloides - Washington, Oregon, Idaho, Alberta, Montana, Wyoming

Polygonum ramosissimum is a North American species of herbaceous annual plants in the buckwheat family, widespread across much of Canada and the United States, where it is commonly called bushy knotweed. Polygonum ramosissimum has erect stems growing 30 to 100 cm (12 to 39. 5 in) (sometimes to 200 cm or 80 inches) tall, with yellowish-green to blue-green foliage. The stems are freely branched with closed flowers produced in groups of (1) 2 to 3(5) flowers in the upper ocreae of racemes that are up to 15 cm (6 in) long, the inflorescences are spike-like. The greenish-yellow, rarely pink or white marked flowers, are on pedicels that are longer than the calyx. The calyx is around 3 mm (0. 12 in) long and 5-parted with the outer three sepals longer than the inner sepals. The seeds are produced in fruits called achenes, which are egg-shaped, dark brown and around 3 mm (0. 12 in) long. The achenes also have a smooth shiny surface. The late season achenes are larger, from 4 to 15 mm long. Polygonum ramosissimum has erect stems growing 30 to 100 cm (12 to 39. 5 in) (sometimes to 200 cm or 80 inches) tall, with yellowish-green to blue-green foliage. The stems are freely branched with closed flowers produced in groups of (1) 2 to 3(5) flowers in the upper ocreae of racemes that are up to 15 cm (6 in) long, the inflorescences are spike-like. The greenish-yellow, rarely pink or white marked flowers, are on pedicels that are longer than the calyx. The calyx is around 3 mm (0. 12 in) long and 5-parted with the outer three sepals longer than the inner sepals.

Polygonum sawatchense is a North American species of plants in the buckwheat family. It in the western United States and western Canada, from the Pacific Coast to the western Great Plains, so from British Columbia south to California and east as far as New Mexico, Colorado, Saskatchewan, and the Dakotas. Polygonum sawatchense is a branching, hairless herb up to 50 cm (20 in) tall. Leaves are narrow, up to 45 mm (1. 8 in) long. Flowers are green, red, or white, in elongated arrays.

Polygonum shastense is a species of flowering plant in the knotweed family known by the common name Shasta knotweed. It is native to sections of southwestern Oregon, northwestern Nevada, and northern and central California, where it grows in rocky and gravelly mountainous habitat up to 3300 meters (11,000 feet) elevation. It is most common in the Sierra Nevada. The species name refers to its occurrence on Mount Shasta in Shasta County, California. Polygonum shastense is a rather elegant small perennial shrub producing branching tough, gnarled brown stems reaching a maximum length of 40 centimeters (16 inches), growing prostrate along the ground or somewhat upright. The bases of old plants can be wide, woody and gray (see image above left). Polygonum shastense is a rather elegant small perennial shrub producing branching tough, gnarled brown stems reaching a maximum length of 40 centimeters (16 inches), growing prostrate along the ground or somewhat upright. The bases of old plants can be wide, woody and gray (see image above left). The leaves lining the slender but rough stems are uniform in size and distribution, not clustered or reduced in size near stem tips. They are lance-shaped with two parallel veins separating three raised areas on the upper surface (see closeup at left), each leaf measuring 5 to 8 millimeters (0. 20-0. 32 inches) long. Leaves emerge curled slightly and folded in half lengthwise. Leaves have stipules which are widened into membranous ochrea wrapped around the leaf bases. Flowers occur in clusters in upper leaf axils. Each is just under a centimeter wide and has five rounded petals, either white with a green stripe or pink with a dark stripe. There are 5-8 stamens and a triangular pistil with a 3-lobed style. Plants may have either all white, all pink, or a mixture of flower colors.

Polygonum spergulariiforme is a North American species of flowering plants in the buckwheat family known by the common name spurry knotweed or fall knotweed. It grows in western Canada (British Columbia and Saskatchewan) and the western United States (primarily Washington, Oregon, and northern and central California but with a few isolated populations in Idaho, Wyoming and Montana). Polygonum spergulariiforme is a green, branching herb up to 50 cm (20 in) tall. Leaves are narrow, up to 6 cm (2. 4 in) long. Flowers are pink or white, in dense, elongated clumps. The plant flowers from June to October, later than some of its relatives.

Polystichum californicum is a species of fern known by the common name California sword fern. It is native to western North America from British Columbia to California, where it occurs in the coastal mountain ranges and the Cascade Range through the Sierra Nevada. Its habitat includes forest understory and open rocky slopes. This fern produces several arching or erect leaves up to a meter long. Each lance-shaped leaf is made up of many sharp-toothed segments. The undersides bear rounded sori which contain the spores. This fern arose as a hybrid between other Polystichum species and readily forms hybrids of its own.

Polystichum dudleyi is a species of fern known by the common name Dudley's sword fern. It is endemic to California, where it is known from the forests of the central and southern California Coast Ranges. The Polystichum dudleyi fern produces several arching leaves up to a meter-3 feet long. Each lance-shaped leaf is made up of many lance-shaped leaflets which are deeply divided into smaller segments. The Polystichum dudleyi fern produces several arching leaves up to a meter-3 feet long. Each lance-shaped leaf is made up of many lance-shaped leaflets which are deeply divided into smaller segments.

Polystichum imbricans is a species of fern known by the common names narrowleaf swordfern and imbricate sword fern. It is native to western North America from British Columbia to southern California, where it grows in rocky habitat in coastal and inland mountain ranges and foothills. This fern produces several erect linear or lance-shaped leaves up to 80 centimeters long. Each leaf is made up of many narrow, overlapping, sometimes twisting leaflets each 2 to 4 centimeters long. The leaflets have toothed edges. This fern readily forms hybrids, some of which are fertile and are considered separate species, such as Polystichum californicum, its hybrid with P. dudleyi.

Polystichum kruckebergii is a species of fern known by the common names Kruckeberg's sword fern and Kruckeberg's hollyfern. It is native to western North America from Alaska to Utah to California, where it grows in rocky mountain habitat in subalpine and alpine climates. This fern produces several narrow, erect leaves 10 to 25 centimeters long. Each leaf is made up of many oval to triangular leaflets, each no more than about 1. 5 centimeters long. The leaflets overlap and are somewhat twisted in their axes. Their edges are cut or toothed, the teeth sometimes tipped with spines.

Polystichum lemmonii is a species of fern known by the common names Lemmon's holly fern and Shasta fern. It is native to western North America from the Sierra Nevada of California north to Washington. It is also known from British Columbia, where there is a single occurrence in the mountains above the Okanagan Valley. It grows in mountainous habitat on ultramafic rock substrates, often in serpentine soils. This fern produces several narrow, erect lance-shaped leaves 10 to 35 centimeters long. Each leaf is made up of many oval leaflets which are overlapping, folded, and twisted such that the leaves may appear almost cylindrical. Their edges are cut or toothed.

Polystichum lonchitis is a species of fern known by the common name northern hollyfern, or simply holly-fern. It is native to much of the Northern Hemisphere from Eurasia to Alaska to Greenland and south into mountainous central North America. It grows in moist, shady, rocky mountain habitat. This fern produces several erect linear leaves up to 60 centimeters long. Each leaf is made up of many lance-shaped to oblong leaflets up to 3 or 4 centimeters long, the longest ones occurring distal to the midpoint of the leaf, the basal leaflets smaller and triangular in shape. The leaflets have toothed and often spiny edges. Media related to Polystichum lonchitis at Wikimedia Commons

Western sword fern (Polystichum munitum) is a large evergreen fern with dark green fronds that grow in a tight clump, spreading out radially from a round base. It grows up to 6 feet tall and 5 feet wide and is moderate to fast growing. Individual fronds live for 1.5-2.5 years and remain attached to the base after withering.

It is excellent as an ornamental groundcover for shade. Plant in partial to full shade and give moderate to regular water. It prefers well-draining, rocky, acidic soil but can tolerate clay.

This plant attracts butterflies and hosts a likely total of 3 species of butterfly and moth. It is deer and rabbit resistant.

Polystichum scopulinum is a species of fern known by the common names mountain hollyfern and rock sword fern. It is native to much of western North America, and it is known from disjunct occurrences in eastern Canada, as well. It grows in rocky habitat, often in full sun. It is widespread but mostly found in small populations, and is noted to be most abundant on serpentine soils. This fern produces several erect, narrowly lance-shaped leaves up to 50 centimeters in length. The leaves narrow near the bases. Each leaf is divided into many lance-shaped or oblong leaflets up to 3 centimeters long. The toothed leaflets are sometimes twisted on their axes and overlapping.

Populus angustifolia is a species of poplar tree known by the common names Narrowleaf Cottonwood and Willow-leaved Poplar. This tree is native to the Great Basin in the United States where it is most often found by streams and creeks at some elevation. The tree is slim in profile, with yellow-green lance-shaped leaves-(lance-shaped), with scalloped margins. The catkins are fluffy and white. The buds are sticky and gummy and were enjoyed as a sort of chewing gum by local Native American peoples, including the Apache and Navajo.

Fremont cottonwood (Populus fremontii) is a fast-growing native shade tree found in alluvial bottomlands and along streamsides at elevations from 0 to 6,500 feet. It thrives in moist soils with plenty of sunlight and is known for its striking, heart-shaped leaves that shimmer in the wind.

This tree is tough and easy to grow, reaching up to 100 feet tall and 35 feet wide when well-watered. It can grow 10–20 feet in a single year, making it ideal for large spaces but unsuitable for small gardens. Due to its invasive roots, it should not be planted near lawns or structures.

Often, only male trees are sold to avoid the "cotton" produced by female trees. Fremont cottonwood is ecologically important, providing habitat and food for birds and butterflies.

Grows best in loamy, medium draining soil. Selection (male) for the garden.

Fremont Cottonwood (Populus fremontii ssp. fremontii) is a native tree that grows in northern, southern and central California. It tends to grow in alluvial bottomplands and streamsides, at elevations from 0-6500 feet.

Populus tremuloides is a deciduous tree native to cooler areas of North America. The species is referred to as Quaking Aspen, Trembling Aspen, and Quakies, names deriving from its leaves which flutter in even a slight breeze. The tree can become tall, up to 25 meters, but is more often half that height, with smooth pale bark scarred with black. The glossy green leaves, dull beneath, become golden to yellow, rarely red, in Autumn. The species rarely flowers, often propagating through its roots to form large clonal groves. The quaking or trembling of the leaves is due to its flattened petioles. The specific epithet, tremuloides, is given for this trembling characteristic. Other species of Populus have petioles flattened partially along their length, while the Quaking Aspen's are flattened from side to side along the entire length of the petiole. This quaking of the leaves produces a soft sound that many consider a hallmark of the Quaking Aspen. It can be found in many parts of North America. In California it is most common in the Sierras and other high elevation mountains. Nurseries usually sell only male plants because female plants can produce large amounts of cottony seeds. Unless you have acreage, use caution in planting this tree because it will send out suckers long distances to quickly form a dense grove that will fill in any moist area. There are usually few understory plants in Quaking Aspen groves.

Black Cottonwood (Populus balsamifera ssp. trichocarpa) is a native tree that grows in northern, southern and central California. It is fast growing and moderately 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 deciduous. It tends to grow in alluvial bottomplands and streamsides, at elevations from 0-9000 feet. Tough and easy to grow as long as it is in sun, near a water sources and has very good drainage. Black Cottonwood is a great choice to help build a natural irrigation system - its long shallow roots will reach out to the water source and pull underground water molecules through your garden. It needs moist soil until mature, and then becomes moderately drought tolerant.

Porophyllum gracile is a species of flowering plant in the aster family known by the common names odora and slender poreleaf. It is native to northern Mexico and the southwestern United States from California to Texas, where it can be found in rocky and sandy desert scrub habitat. This species grows into a small, short lived perennial shrub with branching slender stems measuring up to about 70 centimeters in maximum length. The stems are hairless and waxy in texture. The sparse waxy leaves are linear in shape and 1 to 5 centimeters in length. The herbage is glandular and aromatic with a strong scent.

Portulaca halimoides is a species of purslane known by the common name silkcotton purslane. It is native to the deserts of the southwestern United States and northern Mexico, as well as parts of Central and South America. It is a fleshy annual herb producing a branching stem spreading to a maximum length around 25 centimeters. It is often pink or red in color and there are strands of woolly hairlike trichomes at nodes along the stem and within the inflorescence. The thick, cylindrical, blunt-tipped leaves are up to 2 centimeters in length and green to red in color. Flowers occur in clusters of up to 10 at the tips of the stem branches. Each is a few millimeters wide with yellow petals which are sometimes hidden under the two fused, fleshy red sepals. The fruit is a tiny capsule which contains several seeds. The grainlike seeds may be black, grayish, or silvery in color.

Argentina anserina, also known as common silverweed, silverweed cinquefoil or just "silverweed", is a flowering perennial plant in the rose family Rosaceae. It is native throughout the temperate Northern Hemisphere, often on river shores and in grassy habitats such as meadows and road-sides. The plant was formerly classified in the genus Potentilla but was reclassified into the resurrected genus Argentina by research in the 1990s. It is a species aggregate which has frequently been divided into multiple species. Silverweed is most often found in sandy or gravelly soils, where it may spread rapidly by its prolific rooting stolons. It typically occurs in inland habitats, unlike A. egedii, which is a salt-tolerant coastal salt marsh plant.

Pacific Potentilla (Potentilla anserina ssp. pacifica) is a native perennial herb that grows in Northern, Southern and Central California, primarily in the North Coast, the Central Coast and South Coast regions. It tends to grow in wet and brackish places, at elevations from 0-800 feet.

Potentilla basaltica is a species of flowering plant in the rose family known by the common names Soldier Meadows cinquefoil and basalt cinquefoil. It is endemic to a small area of the Modoc Plateau and Warner Mountains in northeastern California and northwestern Nevada. Potentilla basaltica occurs in Humboldt County, Nevada, and Lassen County, California, where there are a total of four occurrences. It grows in moist alkaline meadows near streams and springs. Stems are up to 50 centimeters long and may be purple-tinged. Most of the leaves are located around the base of the plant. They are each divided into several pairs of leaflets. There are a few smaller leaves located along the stems. Flowers. The flowers at the ends of the stems have bright yellow petals.

Potentilla biennis is a species of cinquefoil known by the common names biennial cinquefoil and Greene's cinquefoil. It is native to western North America from northwestern Canada to the southwestern United States, where it grows in moist habitat. This is an annual or biennial herb producing an erect stem up to 70 centimeters tall from a taproot. It is hairy and glandular in texture. The hairy leaves are each divided into three toothed, oval leaflets each up to 3 centimeters long. The inflorescence is a cyme of several flowers. Each flower has five oval yellow petals 1 or 2 millimeters long and five triangular sepals which are slightly longer. The fruit is a minute whitish achene.

Potentilla cristae is a rare species of cinquefoil known by the common name crested cinquefoil. It is endemic to the Klamath Mountains of far northern California, where it is known from a few occurrences in the subalpine and alpine climates of the high mountain ridges. It grows in talus and moist rocky or gravelly serpentine soils. This is a low, matted plant producing a clump of hairy, glandular herbage up to about 20 centimeters tall. Each hairy leaf is divided into three rounded leaflets which are toothed or lobed and measure up to 2 centimeters in length. The inflorescence is a cyme of a few flowers, each with five small yellow petals. The fruit is a minute achene just a millimeter wide, which is smooth with a crest.

Potentilla drummondii is a species of cinquefoil known by the common name Drummond's cinquefoil. It is native to North America from Alaska to California, where it grows in many types of moist habitat. It is perhaps better described as a species complex containing many intergrading subspecies that readily hybridize with other Potentilla species. The plant is variable, growing decumbent or erect, small and tufted or up to 60 centimeters tall, hairless to woolly. The leaves are divided into several leaflets, which may be cut into lobes or toothed. The inflorescence is a cyme of several flowers. Each has a small corolla of yellow petals, each petal one half to one centimeter in length.

Potentilla flabellifolia is a species of cinquefoil known by the common names high mountain cinquefoil, fanleaf cinquefoil and fan-foil. It is native to western North America from British Columbia to California to Wyoming, where it grows in higher elevation mountainous habitat, such as summertime meadows. It produces one or more erect stems from a branching caudex and system of rhizomes. It grows 10 to 30 centimeters tall, and is slightly hairy to nearly hairless. The leaves are ternate, divided into three leaflets. The basal leaves are largest, borne on long petioles. Each has oval leaflets up to 3 centimeters long which are deeply cut into blunt teeth. Smaller leaves occur higher on the stem. The inflorescence is a cyme of one or more flowers. The flower has usually five yellow petals up to a centimeter long on a calyx of pointed sepals and narrower pointed bractlets.

Varileaf Cinquefoil (Potentilla diversifolia) is a native perennial herb that grows in Central California, primarily in the High Sierra Nevada region. It is moderately fast growing and moderately long-lived. It grows in a semi-upright form to a height of 3 feet, with active growth during the spring and summer. Flowers are yellow and striking, and bloom in the late spring. Leaves are medium green and deciduous. It tends to grow in moist rocky places, at elevations from 8000-11600 feet.

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.