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

Distribution of Grindelia stricta
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Introduction

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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Illustration Source: The Illustrated Flora of British Columbia

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

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

Ecology

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
Site Information	Minimum	Average	Maximum
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 Class	D
Number of field plots species was recorded in:	10
Modal BEC Zone Class	CDF
All BEC Zones (# of stations/zone) species was recorded in:	CDF(7), CWH(3)
Source: Klinkenberg 2020

Climate

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.

Status Information

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Native	S5	Yellow	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Synonyms and Alternate Names

Grindelia integrifolia DC.
Grindelia integrifolia var. macrophylla
Grindelia macrophylla

Taxonomic and Nomenclatural Links

Flora North America treatment for Asteraceae
Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer
USDA

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. 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: 2024-05-10 1:03:43 AM ]

Disclaimer: The information contained in the E-Flora atlas pages is derived from expert sources as cited in each section. This information is scientifically based. E-Flora also acts as a portal to other sites via deep links. As always, users should refer to the original sources for complete information. E-Flora BC is not responsible for the accuracy or completeness of the original information.