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.
Gaviota is an unincorporated community in Santa Barbara County, California on the Gaviota Coast about 30 miles (48 km) west of Santa Barbara and 15 miles (24 km) south of Buellton.
Arctostaphylos glandulosa, with the common name Eastwood's manzanita, is a species of manzanita.
Hemizonia congesta, known by the common name hayfield tarweed, is a species of flowering plant in the family Asteraceae, native to western North America.
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.
Holocarpha heermannii is a species of flowering plant in the family Asteraceae known by the common name Heermann's tarweed. It is endemic to California.
Holocarpha virgata is a species of flowering plant in the family Asteraceae known by the common names yellowflower tarweed, pitgland tarweed, and narrow tarplant.
Deinandra bacigalupii is a rare species of flowering plant in the family Asteraceae, known by the common names Livermore tarplant and Livermore moonshine. It is endemic to Alameda County, California, and is only found within a half-mile of the city limits of Livermore, in the eastern portion of the Livermore Valley. The plant is considered endangered under the California Endangered Species Act, and there are only four known populations; a fifth was destroyed by a landscaping business in 2014. The majority is located on city property near the Springtown neighborhood. It grows in open areas with alkali soils, in alkali meadows and on the edges of alkali sinks, and appears to be restricted to a soil called Solano fine sandy loam. This plant was previously included within Deinandra increscens ssp. increscens, but it was separated and elevated to species level in 1999.
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 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.
Harmonia is a genus of plants in the family Asteraceae. All 5 known species are endemic to the Coast Ranges of northern and central California. All but H. nutans grow on serpentine soils.
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.
Centromadia parryi, the pappose tarweed, is a species of plant in the tribe Madieae within the family Asteraceae. It is found in North America where it is native to California and, northern Baja California.
Deinandra corymbosa is a rare North American species of plants in the tribe Madieae within the family Asteraceae. A common name is coastal tarweed.
Deinandra greeneana is a rare North American species of 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 halliana, or Hall's tarplant, is a California species of plants in the tribe Madieae within the family Asteraceae. It has been found in the Coast Ranges of Central California, in Monterey, Fresno, San Benito, and San Luis Obispo 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.
