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

Arcteranthis cooleyae
Cooley's buttercup
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Hans Roemer  Email the photographer   (Photo ID #64126)

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Distribution of Arcteranthis cooleyae
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Species Information

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Perennial herb from fibrous-rooted stem-base; stems erect, 2-14 cm tall in flower, to 23 cm in fruit, smooth.
All basal, circular to kidney-shaped, deeply palmately 3- to 5-lobed, the edges overlapping somewhat, 1-4 cm long, 1.5-7 cm wide, the lobes again lobed, the ultimate segments elliptic or oblong, margins toothed, tips rounded and bearing minute projecting vein tips, the stalks to 15 cm long; stem leaves none to 2, scale-like.
Inflorescence a solitary terminal flower; flower stalks to 14 cm long; receptacle smooth; petals 11 to 15, distinct, yellow, oblanceolate to spoon-shaped, 8-12 mm long, 3-5 mm wide, long-clawed, nectary on upper surface, the nectary scale divided and V-shaped; sepals 5, spreading, persistent, greenish-yellow, 7-11 mm long, 4-7 mm wide, smooth; stamens (50) 75-125; pistils (30) 70-100.
Achenes, numerous in a globe-shaped head 7-8 mm long, 9-10 mm wide, the achenes elliptic, 2.4-4.6 mm long, 1.2-2.2 mm wide, smooth, membranous, margins and faces strongly veined; beaks persistent, thread-like, 1-1.8 mm long, hooked at tip.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist snowbeds, streambanks, ledges, gullies, scree slopes and heath in the subalpine and alpine zones; common in NW BC (including the Queen Charlotte Islands), infrequent in SW BC, rare east of Coast Mountains; N to AK and S to WA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Arcteranthis cooleyae

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) 690 1344 1695
Slope Gradient (%) 0 29 88
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
13 348 300
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 5
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: BAFA(2), CMA(8), ESSF(2), MH(5), SWB(1)

Synonyms and Alternate Names

Ranunculus cooleyae Vasey & Rose

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References