Ranunculus fascicularis
Ranunculus repens
early buttercup, early crowfoot, prairie buttercup, tuft buttercup
creeping buttercup, crowfoot, double flower creeping buttercup, renoncule rampante, spot-leaf crowfoot
always both filiform and tuberous on same stem.
never tuberous.
erect or ascending, never rooting nodally, strigose or spreading-strigose, base not bulbous.
decumbent or creeping, rooting nodally, hispid to strigose or almost glabrous, base not bulbous.
blades ovate to broadly ovate in outline, 3-5-foliolate, 2.1-4.7 × 1.9-4.5 cm, leaflets undivided or 1x-lobed or -parted, ultimate segments oblanceolate or obovate, margins entire or with few teeth, apex rounded-acute to rounded-obtuse.
blades ovate to reniform in outline, 3-foliolate, 1-8.5 × 1.5-10 cm, leaflets lobed, parted, or parted and again lobed, ultimate segments obovate to elliptic or sometimes narrowly oblong, margins toothed, apex obtuse to acuminate.
receptacle hispid or glabrous;
sepals spreading or sometimes reflexed from base, 5-7 × 2-3 mm, hispid or glabrous;
petals 5(-7), yellow, 8-14 × 3-6 mm.
receptacle hispid or rarely glabrous;
sepals spreading or reflexed from base, 4-7(-10) × 1.5-3(-4) mm, hispid or sometimes glabrous;
petals 5(-150), yellow, 6-18 × 5-12 mm.
globose or ovoid, 5-9 × 5-8 mm;
achenes 2-2.8 × 1.8-2.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;
beak persistent, filiform, straight, 1.2-2.8 mm.
globose or ovoid, 5-10 × 5-8 mm;
achenes 2.6-3.2 × 2-2.8 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;
beak persistent, lanceolate to lance-filiform, curved, 0.8-1.2 mm.
= 32.
= 14, 32.
Ranunculus fascicularis
Ranunculus repens
Ranunculus fascicularis is very similar to R. hispidus var. hispidus, and herbarium specimens without underground parts may be difficult to identify. Ranunculus fascicularis grows in drier habitats; segments of its leaves are commonly oblanceolate and blunt, with few or no marginal teeth; and its petals are widest at or below the middle. Ranunculus hispidus var. hispidus is usually larger in all its parts (leaves, flowers, heads of achenes); leaf segments are variable in shape but their apices are normally sharper and their marginal teeth more numerous, and petals are widest above the middle.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Ranunculus repens is widely naturalized in many parts of the world. Plants with sparse pubescence have been called R. repens var. glabratus. Horticultural forms with the outer stamens transformed into numerous extra petals occasionally become established and have been called R. repens var. pleniflorus. These variants have no taxonomic significance.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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