Perennial herb from a woody root and often an unbranched, short stem-base; stems erect, usually solitary, branched above, loosely bristly-hairy at least at the base, becoming glabrous upwards, exuding a milky juice when broken, 0.3-1.2 m tall.
Basal leaves oblanceolate, narrowed to a stalk, 4-25 cm long, 1.2-4.5 cm wide, sparsely or moderately bristly-hairy or the upper nearly glabrous, entire or wavy-toothed, persistent and often tufted; stem leaves lacking, or if present few, unstalked and reduced.
Heads with strap-shaped flowers, several or many on slender stalks in a round- to flat-topped inflorescence; involucres 6-11 mm tall; involucral bracts linear-lanceolate, scarcely graduated, greenish or blackish, glabrous or often sparsely glandular with pale or black hairs, sometimes with a few bristly hairs; ray flowers white.
Achenes narrowed at the base, several-ribbed, 2.5-3 mm long; pappus of many white to brownish bristles.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Present over the Summer
Source: The USDA
||Value / Class
Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
of field plots
species was recorded in:
BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in
|AT(2), BG(1), BWBS(14), CDF(22), CWH(78), ESSF(606), ICH(972), IDF(511), IMA(1), MH(3), MS(358), PP(9), SBPS(32), SBS(172), SWB(2)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Chlorocrepis albiflora (Hook.) W.A. Weber
Hieracium helleri Gandog.
Hieracium siskiyouense M. Peck