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

Ranunculus hyperboreus Rottb.
far-northern buttercup (high northern buttercup)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Mike Russum  Email the photographer   (Photo ID #65705)

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Distribution of Ranunculus hyperboreus
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Species Information

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Aquatic or amphibious, perennial herb, rooting from nodes, roots slender, fibrous; stems slender, floating or trailing, smooth.
Basal leaves absent; stem leaves kidney-shaped to broadly fan-shaped, deeply 3-lobed or 3-parted, 0.3-1.2 cm long, 0.5-2 cm wide, bases blunt to heart-shaped, the lobes undivided or the lateral cleft, the terminal segment entire or with small round teeth near tip, tips rounded; long-stalked; smooth.
Inflorescence of solitary terminal and axillary flowers, long-stalked; receptacle smooth; petals 3 or 4, distinct, yellow, 2-4 mm long, 1-3 mm wide, egg-shaped, nectary on upper surface, the nectary scale partially covering nectary; sepals 3 or 4, spreading or bent back from base, 2-4 mm long, 1-3 mm wide, smooth; stamens 10-20; pistils 10-70.
Achenes, several in a globe- to short egg-shaped head 3-5 mm long, 2-5 mm wide, the achenes egg-shaped, slightly flattened, 1-1.4 mm long, 0.8-1.2 mm wide, smooth; beaks persistent, curved, 0.1-0.4 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Source:  The USDA

Habitat / Range

Ponds, muddy shores, and mossy seepage sites in thickets and forests in the montane zone; frequent in N BC, rare southward to 53degreeN, circumpolar, N to AK, YT and NT, E to Labr. and PQ and S to CO; Greenland, Iceland, N Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Ranunculus hyperboreus

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) 30 657 1310
Slope Gradient (%) 0 3 12
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
45 45 45
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 5 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: BWBS(1), CWH(2)


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

Ranunculus hyperboreus subsp. arnellii Scheutz
Ranunculus hyperboreus subsp. hyperboreus
Ranunculus hyperboreus subsp. intertextus (Greene) Kapoor & A. Löve & D. Löve
Ranunculus hyperboreus subsp. turquetilianus
Ranunculus hyperboreus var. intertextus (Greene) B. Boivin
Ranunculus hyperboreus var. tuquetilianus Polunin p.p.
Ranunculus intertextus Greene
Ranunculus natans var. intertextus (Greene) L.D. Benson

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References