Hieracium horridum

Prickly hawkweed

Family: Asteraceae · Type: perennial · Native

Prickly hawkweed is a California native perennial found in the Klamath Ranges, high Cascade Range, Sierra Nevada, San Gabriel Mountains, San Bernardino Mountains, San Jacinto Mountains, and Great Basin in rocky places and crevices at elevations of 1,350 to 3,300 meters. Flowering from June to October, this plant produces yellow flowers in numerous heads with 6 to 12 individual florets. Growing with one to several stems from a taproot, reaching 10 to 45 centimeters tall and densely covered in long white or brown hairs. Its cauline leaves are oblong, 3 to 10 centimeters long, positioned alternately along the stem and remaining entire. The plant's distinctive involucre is 6 to 9 millimeters long, slightly cylindric to bell-shaped, with short branched hairs that have black bases.

Habitat: Rocky places, crevices

Bloom period: Jun-Oct

Elevation: 1350-3300 m

Bioregions: KR, CaRH, SNH, SnGb, SnBr, SnJt, GB

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