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Hemizonia is a genus of plants in the daisy 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.
Hemizonia are usually sticky, aromatic, yellow-flowered annual plants which are hardy and competitive, especially in the dry Mediterranean climate of California.
Selected species
Hemizonia arida — Red Rock Tarweed
Hemizonia clementina — Catalina Tarweed; Santa Catalina Island, Channel Islands
Hemizonia congesta — Hayfield Tarweed; Central Valley (California), California Coast Ranges, SW Oregon
