Potentilla bolanderi, also known as border horkelia and Bolander's horkelia, is a rare species of flowering plant in the family Rosaceae. It is endemic to northern California where it is known from only a few occurrences in two or three counties. It grows in the mountain forests of the North Coast Ranges.
Potentilla californica, also known as California horkelia, is a species of flowering plant in the rose family.
Potentilla clevelandii, also known as Cleveland's horkelia, is a species of flowering plant in the rose family. It is native to the Peninsular Ranges of southern California and northern Baja California.
Potentilla daucifolia, commonly known as carrotleaf horkelia, is a species of flowering plant in the rose family. It is native to the Klamath Mountains and surrounding ranges in northern California and southern Oregon. It grows on mountain slopes and fields, often on serpentine soils.
Potentilla douglasii is a species of flowering plant in the rose family known by several common names, including pinewoods horkelia and dusky horkelia. It is native to the western United States from California to Wyoming, where it is generally found in mountain forests and meadows.
Potentilla marinensis, commonly known as Point Reyes horkelia, is a rare species of flowering plant in the rose family. It is endemic to the California coastline, where it is known from about Fort Bragg to near Santa Cruz. It grows on beaches and in other sandy coastal areas.
Potentilla parryi, commonly known as Parry's horkelia, is a species of flowering plant in the rose family. It is endemic to California, where it grows in the chaparral of the Sierra Nevada foothills.
Potentilla sericata, commonly known as silky horkelia, is a species of flowering plant in the rose family. It is native to the Klamath Mountains of northern California and southern Oregon, where it grows in the chaparral and forest, often on serpentine soils.
Potentilla hendersonii, commonly known as Henderson's horkelia, is a rare species of flowering plant in the rose family. It is known from four populations in southern Oregon, including Mount Ashland, and one population south of the border in Siskiyou County, California. It is a resident of dry forest habitat in the granite soils of the Klamath Mountains.
Potentilla hispidula, commonly known as White Mountains horkelia, is a species of flowering plant in the rose family. It is endemic to the White Mountains, a small range of mountains that straddles the border between California and Nevada east of the Sierra Nevada. It is a resident of dry scrub and alpine and subalpine forest habitat.
Potentilla rydbergii, commonly known as Rydberg's horkelia, is a species of flowering plant in the rose family. It is endemic to the Transverse Ranges of southern California, where it grows in several types of habitat, including pine forest.
Horkelia wilderae is a rare species of flowering plant in the rose family known by the common name Barton Flats horkelia. It is endemic to San Bernardino County, California, where it is known from only about ten occurrences in the vicinity of Barton Flats. It grows in the montane chaparral and woodlands habitat where chaparral meets pine forest, and it is threatened by logging.
Horkelia yadonii is a rare species of flowering plant in the rose family known by the common name Santa Lucia horkelia. It is endemic to California, where it is known from the Central Coast Ranges from Monterey to Santa Barbara Counties. It occupies chaparral and woodland habitat, often in meadows and dry riverbeds. Easily confused with related species, this plant was not recognized as a species of its own until 1993. This is a perennial herb producing hairy, glandular, gray-green mat of erect leaves around a caudex. Each leaf is up to 20 centimeters long and is made up of several pairs of wedge-shaped to rounded leaflets with lobed to deeply notched tips. The inflorescence is an open array of 5 to 10 flowers atop a tall, erect stalk, each flower made up of five pointed, green sepals and five white petals
Nicotiana clevelandii is a species of wild tobacco known by the common name Cleveland's tobacco.
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 flabellifolia is a species of cinquefoil known by the common names high mountain cinquefoil, fanleaf cinquefoil and fan-foil.
Engellaria obtusa is a species of flowering plant in the family Caryophyllaceae known by the common names Rocky Mountain chickweed, blunt-sepaled starwort, and obtuse starwort. It is the sole species in genus Engellaria. It is native to western North America, from British Columbia and Alberta to California to Colorado, where it grows in moist areas in forests and on mountain slopes.
