Ranunculus fascicularis |
Ranunculus allenii |
|
---|---|---|
early buttercup, early crowfoot, prairie buttercup, tuft buttercup |
Allen's buttercup, renoncule d'Allen |
|
Roots | always both filiform and tuberous on same stem. |
slender, 0.2-0.8 mm thick. |
Stems | erect or ascending, never rooting nodally, strigose or spreading-strigose, base not bulbous. |
erect or ascending, 5-19 cm, sparsely pilose, each with 1-4 flowers. |
Basal leaves | 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. |
persistent, blades reniform or semicircular, undivided or some 3-parted, 1.4-2.1 × 1.7-2.8 cm, base cordate or truncate, margins crenate with more than 5 crenae, apex rounded. |
Flowers | 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. |
pedicels pilose, sometimes sparsely so; receptacle hispid; sepals 4-6 × 2-3 mm, abaxially pilose, hairs colorless; petals 5, 4-5 × 2-4 mm; nectary scale glabrous. |
Heads of achenes | 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. |
ovoid to cylindric, 4-7 × 4-6 mm; achenes 1.6-1.8 × 1.2-1.4 mm, glabrous; beak lance-subulate, curved, 0.4-0.6 mm. |
2n | = 32. |
= 32. |
Ranunculus fascicularis |
Ranunculus allenii |
|
Phenology | Flowering winter–spring (Jan–Jun). | Flowering summer (Jul–Aug). |
Habitat | Grassland or deciduous forest | Wet alpine meadows, often around late snowbeds, shores of lakes and streams |
Elevation | 0-300 m (0-1000 ft) | 700-1300 m (2300-4300 ft) |
Distribution |
AL; AR; CT; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MS; NC; NE; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; MB; ON
|
NF; NT; QC |
Discussion | 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.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | R. fascicularis var. apricus | |
Name authority | Muhlenberg ex J. M. Bigelow: Fl. Boston., 137. (1814) | B. L. Robinson: Rhodora 7: 220. (1905) |
Web links |