General: Perennial herb from slender fibrous roots; stems several, sometimes erect, usually 1 or more creeping and freely rooting at nodes, to 100 cm long, often slightly hollow; plants hairy.
Leaves: Basal egg-shaped to triangular, 3-parted, 1-8.5 cm long, 1.5-10 cm wide, the leaflets lobed, parted, or parted and again lobed, often with pale spot at the base of each sinus, the ultimate segments egg-shaped to elliptic or sometimes narrowly oblong, toothed, tips blunt to sharp-pointed, the stalks to 40 cm long; stem leaves alternate, the lower long-stalked, transitional to the simple to 5-parted bracts.
Flowers: Inflorescence of few-flowered cymes terminal on erect stem and branches; flower stalks to 15 cm long; receptacle long stiff-hairy or rarely smooth; petals usually 5, sometimes 6 to 9 (to many), distinct, yellow, broadly egg-shaped to nearly circular, 6-18 mm long, 5-12 mm wide, nectary on upper surface, the nectary scale smooth, 1-1.5 mm long; sepals 5, spreading or bent back from base, early deciduous, greenish, 4-7 mm long, 1.5-3 mm wide, long stiff-hairy or sometimes smooth; stamens 30- 80; pistils (10) 20-50.
Fruits: Achenes, several to many in a globe- to egg-shaped head 5-10 mm long, 5-8 mm wide, the achenes egg-shaped to irregularly circular, 2.6-3.2 mm long, 2-2.8 mm wide, smooth, strongly flattened, margins prominent, somewhat keeled; beaks persistent, lanceolate, 0.8-1.2 mm long, curved.
A shade-intolerant, submontane to montane, Eurasian forb introduced to North America where it is transcontinental. Occurs on very moist to wet, nitrogen-rich soils; its occurrence decreases with increasing elevation within montane boreal, wet temperate, and cool mesothermal climates. A widespread weed in non-forested, early-seral communities on disturbed water-receiving and water-collecting sites; most frequent on exposed mineral soil along streams. Tolerates flooding and fluctuating groundwater tables. A nitrophytic species characteristic of Moder and Mull humus forms.
Ranunculus repens Ranunculus repens var. degeneratus Schur Ranunculus repens var. erectus DC. Ranunculus repens var. glabratus DC. Ranunculus repens var. linearilobus DC. Ranunculus repens var. pleniflorus Fernald Ranunculus repens var. typicus G. Beck Ranunculus repens var. villosus Lamotte
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2017. 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:
20/10/2017 12:54:37 PM
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