General: Biennial or sometimes annual herb from a taproot; stems erect, solitary, simple or sometimes branching from the base, lightly woolly-hairy when young, becoming glabrous except at leaf bases, exuding milky juice when broken, 0.3-1 m tall.
Leaves: Basal leaves lacking; stem leaves entire, grasslike, tapering uniformly from base to the apex, parallel-veined, with clasping bases, 20-50 cm long, 0.5-2 cm wide.
Flowers: Heads with strap-shaped flowers, solitary, on much-enlarged, hollow stalks terminating the stems or few branches; involucres 2.5-7 cm tall; involucral bracts linear-lanceolate, equal, usually about 13 or only 8 on dwarfed plants or on last-formed heads, distinctly surpassing the ray flowers; ray flowers pale yellow; disk flowers lacking.
Fruits: Achenes elongate, 5- to 10-ribbed, 2.5-3.6 cm long, tapering to the slender beak; pappus of whitish, slender-tipped, feathery bristles, the feathery branches interwebbed.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2017. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
24/06/2017 1:38:40 PM
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