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Castilleja campestris is a species of Indian paintbrush known by the common name vernal pool Indian paintbrush. It is native to California and southern Oregon, where it grows in seasonally moist habitat, especially vernal pools.

Castilleja brevistyla is a species of Castilleja (Indian paintbrush) known by the common name shortstyle Indian paintbrush. It is endemic to California, where it grows on the grassy mountain slopes surrounding the San Joaquin Valley.

Castilleja attenuata is a species of Indian paintbrush, known by the common names valley tassels , attenuate Indian paintbrush, and narrowleaf Owl's-clover. It is native to western North America from British Columbia, through California, to Baja California, where it grows in grasslands and open woodland habitats.

Triphysaria pusilla is a species of flowering plant in the family Orobanchaceae known by the common name dwarf owl's-clover. The plant is native to the west coast of North America from British Columbia to central California from the California Coast Ranges across to the Sierra Nevada. It grows in moist open habitat such as spring-fed grasslands.

Triphysaria floribunda is a rare species of flowering plant in the family Orobanchaceae known by the common name San Francisco owl's-clover. It is endemic to California, where it is known only from the San Francisco Bay Area. It is limited to coastal regions of Marin, San Francisco, and San Mateo Counties, where it occurs in coastal prairie habitats, sometimes on serpentine soils.

Triphysaria eriantha is a species of flowering plant in the family Orobanchaceae, known by the common names johnny-tuck and butter-and-eggs. It is native to California and southwestern Oregon, where it grows in many types of habitats including chaparral, becoming quite common in some areas.

Perideridia erythrorhiza is a rare species of flowering plant in the family Apiaceae known by the common names western yampah and redroot yampah. It is endemic to Oregon in the United States, where there are about 20 occurrences. The populations occur in three regions in southwestern Oregon, which are separated by more than 50 miles (80 km). The three separate groups are in the Klamath Mountains and on either side of the Cascade Range. This plant is a perennial herb growing up to 1.2 meters (3 ft 11 in) in height. The roots are pink to reddish brown in color. The inflorescence is an umbel of

Castilleja tenuis is a species of Indian paintbrush, known by the common name hairy Indian paintbrush. It is native to the Northwestern United States, California, Nevada, and British Columbia. It grows from 1,000–2,800 metres (3,300–9,200 ft) in a number of habitat types including meadows, especially in mountainous areas including the Sierra Nevada and Cascade Range.

Castilleja rubicundula is a species of Indian paintbrush known by the common name cream sacs. It is native to northern California and southwestern Oregon. It is found in coastal and inland grasslands.

Castilleja lineariloba is a species of Indian paintbrush known by the common name thin-lobed owl’s clover that is endemic to the grasslands of the Sierra Nevada foothills in California.

Castilleja lacera is a species of Indian paintbrush known by the common name cutleaf Indian paintbrush. It is native to California and southern Oregon, where it grows in grassy mountain and foothill habitat. This is an annual herb coated in glandular hairs and growing up to about 40 centimeters tall. It has linear and lance-shaped leaves up to 5 centimeters long. The inflorescence is made up of hairy green bracts and bright yellow pouched flowers.

Castilleja exserta (formerly Orthocarpus purpurascens) is a species of plant in the genus Castilleja which includes the Indian paintbrushes. Its common names include purple owl's clover, escobita, and exserted Indian paintbrush. This species is native to the Southwestern United States in various habitats of California, Arizona, and New Mexico; and to Northwestern Mexico. It is an introduced species in Hawaii.

Castilleja densiflora is a herbaceous flowering plant species known by the common names denseflower Indian paintbrush or white / denseflower owlclover. Like other members of the Indian paintbrushes, it is a root-parasite. It is native to California and northern Baja California, where it grows in grassland and chaparral habitat. It is a variable species. It is generally 10 to 40 centimeters tall with linear or lance-shaped leaves up to 8 centimeters long, and with or without lobes. The inflorescence is as small as 3 centimeters or as long as 25 centimeters in length, and has bracts tipped in

Carex liui is a perennial sedge of the Cyperaceae family that is native to south eastern China and Taiwan.

Perideridia lemmonii is a species of flowering plant in the family Apiaceae known by the common names Lemmon's yampah and tuni. It is native to the western United States, where it is known from southeastern Oregon, western Nevada, and the mountains of eastern California. It grows in meadows, forests, and other habitat. It is a perennial herb approaching one meter in maximum height, its slender, erect stem growing from usually a single small tuber about 1.5 centimeters long. Leaves near the base of the plant have blades up to 30 centimeters long divided into one or two pairs of leaflets, each

Perideridia bacigalupii is an uncommon species of flowering plant in the family Apiaceae known by the common names Mother Lode yampah and Bacigalupi's perideridia. It is endemic to California, where it is known only from the northern and central Sierra Nevada foothills. It is a member of the flora in chaparral and pine woodlands. It is a perennial herb which may exceed 1.5 meters in maximum height, its slender, erect stem growing from tubers. Leaves near the base of the plant have blades up to 40 centimeters long which are divided into many narrow subdivided lobes. Leaves higher on the plant

Carex tenuior is a perennial sedge of the Cyperaceae family that is native to the Ryukyu Islands south of Japan.

Triphysaria micrantha is a species of flowering plant in the family Orobanchaceae known by the common name purplebeak owl's-clover. It is endemic to California, where it is known from the grasslands of the Central Valley and the foothills to the east and west. It an annual herb producing a hairy, glandular, purple-colored stem up to about 15 centimeters in maximum height. Like many species in its family it is a facultative root parasite on other plants, attaching to their roots via haustoria to tap nutrients. Its greenish to red-purple leaves are up to 2.5 centimeters long and are sometimes

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Castilleja lasiorhyncha is a species of Indian paintbrush is endemic to southern California known by the common name San Bernardino Mountains Indian paintbrush. Most of the plant's range is in the San Bernardino Mountains, where it grows in forests and meadows. Castilleja lasiorhyncha only existing populations are in San Bernardino County and possibly San Diego County, with historical occurrences also known from Riverside County.

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