Ranunculus fascicularis |
Ranunculus micranthus |
|
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early buttercup, early crowfoot, prairie buttercup, tuft buttercup |
rock buttercup, small-flower crowfoot |
|
Roots | always both filiform and tuberous on same stem. |
dimorphic, some filiform, 0.2-0.6 mm thick and some with tuberous bases 1-2 mm thick. |
Stems | erect or ascending, never rooting nodally, strigose or spreading-strigose, base not bulbous. |
erect, 11-40 cm, villous, each with 8-35 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 ovate, orbiculate, or transversely elliptic, outer blades undivided, inner 3-parted or 3-foliolate, 1-3.3 × 1-3 cm, base truncate to broadly obtuse or sometimes weakly cordate, margins crenate, apex rounded-obtuse. |
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 glabrous or villous; receptacle glabrous; sepals 2-4 × 1-1.5 mm, abaxially glabrous or pubescent, hairs colorless; petals 5, 1.5-3.5 × 0.5-1.5 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. |
globose to cylindric, 3-7 × 2-4 mm; achenes 1.1-1.5 × 1-1.3 mm, glabrous; beak subulate, straight or curved, 0.2-0.3 mm. |
2n | = 32. |
= 16. |
Ranunculus fascicularis |
Ranunculus micranthus |
|
Phenology | Flowering winter–spring (Jan–Jun). | Flowering spring (Mar–May). |
Habitat | Grassland or deciduous forest | Woods, meadows, and clearings |
Elevation | 0-300 m (0-1000 ft) | 0-1000 m (0-3300 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
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AL; AR; CT; DC; IL; IN; KS; KY; MA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SD; TN; VA; WV
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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 | R. micranthus var. cymbalistes, R. micranthus var. delitescens |
Name authority | Muhlenberg ex J. M. Bigelow: Fl. Boston., 137. (1814) | Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 18. (1838) |
Web links |