Oregon gumweed is perennial herbaceous species found in North America from southern BC to northern California where it is found in beaches, rocky bluffs, and disturbed sites. Flowers are yellow, daisy-like; it is summer flowering. Appearance varies with the environment (Douglas et al 1998).

General:
Perennial herb from a taproot and a stout branched stem-base; stems erect or ascending, several, usually branched, nearly glabrous or with long, soft hairs, 15-80 cm tall.

Leaves:
Basal leaves alternate, toothed or entire, lower ones oblanceolate, up to 40 cm long and 4 cm wide; stem leaves unstalked, sometimes clasping.

Flowers:
Inflorescence of solitary heads or a flat-topped cluster of heads; disk 1-3 cm wide; yellow rays 10-35 or more; involucral bracts slightly or moderately sticky, outer ones long slender, green-tipped, loose or spreading but not regularly reflexed.

Fruits:
Achenes compressed, scarcely nerved; pappus of 2-several deciduous, firm bristles.

Notes:
This is a highly variable species which has received various treatments. Douglas (1995) concluded that it was best to recognize only one environmentally variable species.

Source:  The Illustrated Flora of British Columbia

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

Synonyms and Alternate Names:
Grindelia integrifolia DC.
Grindelia integrifolia var. macrophylla
Grindelia macrophylla