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

Anemone richardsonii Hook.
yellow anemone (yellow thimbleweed)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #26266)

E-Flora BC Static Map
Distribution of Anemone richardsonii
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Species Information

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General:
Perennial herb from a slender rhizome; stems erect, 5-30 cm tall, hairy above.
Leaves:
Basal, 1, simple, ascending, strongly veined, kidney-shaped to circular in outline, 1.5-3 (4) cm long, 1.5-4 cm wide, palmately 3-lobed, smooth or lightly soft-hairy, toothed throughout, the ultimate segments 4-10 (15) mm wide, tips pointed; stalks 2-8 (12) cm long.
Flowers:
Inflorescence a solitary terminal flower; involucral bracts 2 to 3, leaf-like, similar to basal leaves but unstalked, broadly diamond-shaped in outline, and 3-lobed; petals absent; sepals usually 6, petal-like, yellow, elliptic, 8-15 mm long, 4-10 mm wide, hairy outside, at least near base, smooth inside; stamens 25-55.
Fruits:
Achenes, several to many in a loose, spheric head on hairy stalk 3-20 cm long, the achenes egg-shaped to oblong, 3-4 mm long, about 1.5 mm wide, not winged, smooth, abruptly beaked, beaks hooked, 4-6 mm long, smooth.
Notes:
At first glance this yellow-flowered species could be mistaken for Ranunculus lapponicus.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet streambanks, seepage sites, peaty tundra, meadows, thickets, swamps and open forests from the montane to alpine zones; common E of the Coast Mountains and N of 52degreeN; amphiberingian, N to AK, YT and NT, E to PQ and Greenland; NE Asia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Anemone richardsonii

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

Minimum

Average

Maximum

Elevation (metres) 7 1358 1920
Slope Gradient (%) 0 11 50
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
5 243 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 5 7
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
77
Modal BEC Zone Class
BAFA
All BEC Zones (# of stations/zone) species was recorded in: BAFA(26), BWBS(4), CMA(1), CWH(1), ESSF(24), ICH(1), MH(2), SBS(8), SWB(7)

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 not evaluated, unknown or variable.

Synonyms and Alternate Names

Jurtsevia richardsonii (Hook.) A. Löve & D. Löve

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References