Deiandra arida (formerly Hemizonia arida),[3] also called Red Rock tarplant, is a rare California annual plant in the family Asteraceae.[4]
Deiandra arida occurs on clay and volcanic soils and in desert dry wash from 1,000-3,000 feet (300–900 m) in elevation.[4] It is known from only 10 sites in the Red Rock Canyon State Park area of the Mojave Desert in Kern County, California.[4][5][6]
It is a branched annual growing from 1' to 3' (30–90 cm) tall.[4]
Lower leaves are inversely lanceolate and hairless, with toothed margins.[4] Upper leaves are without teeth (entire) at the outside edge, and are covered in sparse, short, stiff hairs, giving it a bristly feel.[4]
Flower heads grow in flat-topped clusters at the tops of stems.[4] Flower heads have 18-25 yellow disk flowers, with 5-10 yellow ray flowers. Bristly phyllaries halfway enclose the akenes.[4]
Deiandra arida (formerly Hemizonia arida), also called Red Rock tarplant, is a rare California annual plant in the family Asteraceae.
