Deinandra halliana

Hall's tarplant

Family: Asteraceae · Type: annual · Native

Conservation status: CNPS 1B.2

Hall's tarplant is a rare (CNPS 1B.1) California native annual found in western San Joaquin Valley and south Coast Ranges in grasslands, open slopes, and sink edges with vertic clay at elevations of 300 to 1,000 meters. Flowering from April to May, this plant produces deep yellow ray flowers 5 to 10 millimeters long in open, flat-topped clusters. Growing 1.5 to 12 decimeters tall with hollow stems that are evenly covered in stalked glands, it has an open, branching form. Its proximal leaves vary from entire to serrate, with glabrous surfaces and margins that can be scabrous or bristly. The plant produces numerous disk flowers with yellow anthers and has no significant pappus.

Habitat: Grasslands, open slopes, sink edges, vertic clay, rarely serpentine

Bloom period: Apr-May

Elevation: 300-1000 m

Bioregions: w SnJV, SCoRI.

California counties: San Luis Obispo, San Benito, Monterey, Fresno, Kern

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.