Helenium puberulum

Rosilla

Family: Asteraceae · Type: perennial · Native

Rosilla is a California native perennial herb found in the Klamath Ranges, northern Coast Ranges, California high country, Sierra Nevada foothills, Central Valley, central western California, western Transverse Ranges, and western Peninsular Ranges in streambanks, seepage areas, and lake margins at elevations up to 1,200 meters. Flowering from June to August, this plant produces yellow disk flowers with reddish-brown to purple tips in heads 9 to 15 millimeters wide, lacking ray flowers. Growing with a single strongly winged stem 50 to 160 centimeters tall that branches toward the top, it has a robust and distinctive appearance. Its leaves range from oblanceolate basal leaves to oblong-elliptic cauline leaves, all generally glabrous or sparsely hairy. The fruit is small, approximately 1.2 to 1.9 millimeters long with 5 to 6 short-awned pappus scales.

Habitat: Streambanks, seepage areas, lake margins

Bloom period: Jun-Aug

Elevation: < 1200 m

Bioregions: KR, NCoR, CaRH, SNF, GV, CW, WTR, w PR

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