Hemizonia is a genus of plants in the family Asteraceae. They are known generally as tarweeds, although some tarweeds belong to other genera, such as Madia and Deinandra. Furthermore, Hemizonia is currently being revised; some species may be segregated into new genera.
Hazardia squarrosa is a North American species of shrub in the family Asteraceae known by the common name sawtooth goldenbush. It is native to California in the United States and Baja California in Mexico.
Hemizonia congesta, known by the common name hayfield tarweed, is a species of flowering plant in the family Asteraceae, native to western North America.
Heterotheca sessiliflora is a species of flowering plant in the family Asteraceae known by the common name sessileflower false goldenaster. It is native to California, Sonora, and Baja California.
Deinandra is a genus of flowering plants in the tribe Madieae within the family Asteraceae. Such a genus is not recognized as distinct by all authorities; its species are often treated as members of the genus Hemizonia.
Madieae is a tribe of flowering plants in the family Asteraceae. It is sometimes considered a subtribe of Heliantheae. Notable species include the tarweeds of the Western United States as well as the silverswords of Hawaii.
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.
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.
Centromadia is a genus of North American plants in the tribe Madieae within the family Asteraceae.
Centromadia fitchii, common name Fitch's spikeweed or Fitch's tarweed, is a species of North American plants in the tribe Madieae within the family Asteraceae. It is native to California and southwestern Oregon.
Centromadia pungens, the common spikeweed or common tarweed, is a species of North American plants in the tribe Madieae within the family Asteraceae. It is native to northern Baja California and the western United States. The plant is considered a noxious weed in parts of the Pacific Northwest.
Deinandra greeneana is a rare North American species of plants in the tribe Madieae within the family Asteraceae.
Deinandra kelloggii, Kellogg's spikeweed or Kellogg's tarweed, is a North American species of plant in the tribe Madieae within the family Asteraceae. It is native to Baja California, southern and central California, and Arizona.
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.
Ericameria parishii, or Parish's rabbitbrush, is a western North American species of flowering plants in the family Asteraceae.
