E-Flora BC: Electronic Atlas of the Flora of British Columbia

Grindelia stricta DC.
Oregon gumweed (entire-leaved gumweed; Puget Sound gumweed)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Dave Ingram  Email the photographer   (Photo ID #5409)

E-Flora BC Static Map
Distribution of Grindelia stricta
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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).

Species Information

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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.
Basal leaves alternate, toothed or entire, lower ones oblanceolate, up to 40 cm long and 4 cm wide; stem leaves unstalked, sometimes clasping.
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.
Achenes compressed, scarcely nerved; pappus of 2-several deciduous, firm bristles.
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

Habitat / Range

Mesic to dry beaches, coastal bluffs, waste places and roadsides in the lowland zone; common in coastal BC; S to N CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Grindelia stricta

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 0 1 2
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
245 245 245
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 5 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CDF(7), CWH(3)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is cool mesothermal.

Synonyms and Alternate Names

Grindelia integrifolia DC.
Grindelia integrifolia var. macrophylla
Grindelia macrophylla

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References