The Hemizonia tarweeds are native to southwestern North America, especially California.

Hemizonia are usually sticky, aromatic, yellow-flowered annual plants which are hardy and competitive, especially in the dry Mediterranean climate of California.

• 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
• Hemizonia conjugens—Deinandra conjugens — Otay tarweed; Otay Mesa area, San Diego.
• Hemizonia fasciculata—Deinandra fasciculata — clustered tarweed; Santa Monica Mountains.
• Hemizonia fitchii — Fitch's tarweed
• Hemizonia floribunda — Tecate tarweed
• Hemizonia frutescens
• Hemizonia greeneana
• Hemizonia increscens—Deinandra increscens — grassland tarweed; coastal California and & Channel Islands
• Hemizonia kelloggii — Kellogg's tarweed
• Hemizonia lobbii — threeray tarweed
• Hemizonia minthornii—Deinandra minthornii — Santa Susana tarweed; Simi Hills, Santa Susana Mountains, and Santa Monica Mountains chaparral. State and CNPS listed vulnerable species.
• Hemizonia mohavensis—Deinandra mohavensis — Mojave tarweed; west Mojave Desert, Transverse Ranges, northern Peninsular Ranges
• Hemizonia palmeri
• Hemizonia paniculata — San Diego tarweed
• Hemizonia pungens — common tarweed ^[1]
• Hemizonia streetsii

• USDA Plants Profile: Hemizonia (Tarweeds)
• Jepson Manual Treatment: Hemizonia
• Encyclopedia of Life: Information on the Tarweeds (Hemizonia species)
•   Media related to Hemizonia at Wikimedia Commons