Madia is a genus of annual or perennial usually aromatic herbs with yellow flowers, in the tribe Madieae within the family Asteraceae.
Eatonella is a North American genus of plants in the family Asteraceae containing the single known species Eatonella nivea, which is called by the common name white false tickhead. This small annual is native to the western United States, particularly the Great Basin, where it grows in sandy soils. It has been found in Washington, Oregon, Idaho, Nevada, and eastern California.
Geraea viscida is a species of flowering plant in the family Asteraceae known by the common name sticky geraea, or sticky desertsunflower. It is native to southern California, mainly the chaparral hills of eastern San Diego County, and nearby Baja California.
Arnica parryi is a North American species of flowering plant known by the common names Parry's arnica or nodding arnica. It is native to western Canada and the western United States as far south as Inyo County, California and McKinley County, New Mexico. It grows in temperate coniferous forests and alpine meadows in mountainous areas, primarily the Rocky Mountains, Cascades, and Sierra Nevada.
Eriophyllum nubigenum, the Yosemite woolly sunflower, is an uncommon flowering plant in the family Asteraceae. It is endemic to California, where it is known only from the Sierra Nevada in and around Yosemite National Park.
Kyhosia is a monotypic genus of flowering plants in the family Asteraceae containing the single species Kyhosia bolanderi, which is known by the common names Bolander's madia and kyhosia.
Harmonia doris-nilesiae is a species of flowering plant in the family Asteraceae known by the common names serpentine tarweed and Niles' madia.
Jensia rammii is a species of flowering plant in the family Asteraceae known by the common name Ramm's madia. It is endemic to California, where it is limited to the northern slopes of the Sierra Nevada and its foothills.
Harmonia stebbinsii is a species of flowering plant in the family Asteraceae known by the common name Stebbins' tarweed, or Stebbins' madia. It is endemic to northern California, where it is limited to the Klamath Mountains and adjacent slopes of the North Coast Ranges. It is a member of the serpentine soils plant community in these mountains, found at elevations of 1100–1600 meters. It is a rare annual herb producing a bristly stem up to about 25 centimeters tall studded with black resin glands. Its bristly leaves grow up to about 2 centimeters long and are mostly gathered near the base of the plant. The inflorescence is an array of flower heads lined with hairy, glandular, purple-tipped phyllaries. The head has a few yellow ray florets several millimeters long and yellow disc florets. The fruit is an achene tipped with a pappus.
Blepharizonia is a genus of flowering plants in the family Asteraceae. There are two species, both endemic to California. They are known generally as big tarweeds.
Arnica dealbata is a species of Californian plants in the tarweed tribe within the aster family
Harmonia guggolziorum is a rare California plant species of plant in the tribe Madieae within the family Asteraceae. It is known by the common names Guggolz tarplant and Guggolzes' harmonia. It is endemic to Mendocino County, California, where it is known from two occurrences near Hopland. It is a member of the serpentine soils flora and grows in chaparral habitat. It was only discovered in 2000 and described to science in 2001.
Deinandra conjugens is a rare species of flowering plant in the family Asteraceae known by the common names Otay tarplant and Otay tarweed. It is native to a small section of far northern Baja California in Mexico, its range extending north into San Diego County, California, in the United States. One isolated population has been reported from the hills east of Cayucos in San Luis Obispo County.
Deinandra increscens is a species of flowering plant in the family Asteraceae known by the common name grassland tarweed. It is endemic to California, where it has been found primarily in Monterey, San Luis Obispo and Santa Barbara Counties. A few isolated populations have been reported from Kern and Merced Counties, but these are from urban areas and probably represent cultivated specimens.
Deinandra fasciculata, known by the common names clustered tarweed and fascicled spikeweed, is a species of flowering plant in the family Asteraceae native to western North America.
Deinandra minthornii — — is a rare California species of flowering plant in the family Asteraceae known by the common name Santa Susana tarplant, or Santa Susana tarweed. It is listed as a rare species by the California Department of Fish and Wildlife and on the California Native Plant Society Inventory of Rare and Endangered Plants of California.
Deinandra mohavensis, commonly known as Mojave tarplant or Mojave tarweed, is a species of flowering plant in the family Asteraceae.
Anisocarpus is a genus of flowering plants in the tribe Madieae within the family Asteraceae.
Deinandra pentactis, the Salinas River tarweed, is a North American species of plants in the tribe Madieae within the family Asteraceae. It is endemic to California, found in the Coast Ranges of San Benito, Monterey, San Luis Obispo, and northern Santa Barbara Counties.
Deinandra pallida, the Kern tarweed, is a California species of plants in the tribe Madieae within the family Asteraceae. It has been found in the Coast Ranges, southern San Joaquin Valley, and Sierra Nevada foothills in Kern, Los Angeles, Santa Barbara, San Luis Obispo, Tulare, and Kings Counties. Isolated populations have been reported from farther north in Tuolumne County and northwestern Fresno County.
