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

Anemone occidentalis S. Watson
western pasqueflower
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Kevin deBoer  Email the photographer   (Photo ID #21194)

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Distribution of Anemone occidentalis
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Species Information

Perennial herb from a taprooted, woody stem-base; stems erect, 10-60 cm tall; soft-hairy.
Basal, (2) 3 to 6 (8), ascending, 4-8 cm long, 3-parted with each leaflet 2- to 3-times pinnatifid, the margins pinnatifid to dissected throughout, the ultimate segments linear, 1-2 mm wide, soft-hairy; stalks 6-8 cm long.
Inflorescence a solitary, terminal flower; flower stalks woolly or densely soft-hairy, becoming smooth in age; involucral bracts 3, sometimes more, leaf-like, similar to basal leaves, short-stalked; petals absent; sepals 5 to 7, petal-like, white, tinged purple near the bases on outside, egg-shaped, 15-30 mm long, 10-17 mm wide, hairy outside, smooth inside; stamens 150-200.
Achenes, numerous in a spheric head, rarely cylindric, on stalks 15-20 cm long, the achenes ellipsoid, 3-4 mm long, about 1.5 mm wide, not winged, soft-hairy; beaks (styles) curved to curved back with age, 2-5 cm long, silky-feathery.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic meadows and forest openings from the montane to alpine zones; common in S BC; E to AB and S to ID, MT and N CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Anemone occidentalis

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) 32 2035 2610
Slope Gradient (%) 0 30 190
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 177 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
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: AT(66), BAFA(6), CMA(7), ESSF(621), IMA(38), MH(2), MS(1), PP(1)


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 not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References