Ranunculus glaberrimus |
Ranunculus micranthus |
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sagebrush buttercup, smooth buttercup |
rock buttercup, small-flower crowfoot |
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Roots | cylindric, 1-3 mm thick. |
dimorphic, some filiform, 0.2-0.6 mm thick and some with tuberous bases 1-2 mm thick. |
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Stems | prostrate or ascending, 4-15 cm, glabrous, each with 1-4 flowers. |
erect, 11-40 cm, villous, each with 8-35 flowers. |
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Basal leaves | persistent, blades reniform or obovate to very narrowly elliptic, 0.7-5.2 × 1-2 cm, base truncate, obtuse or attenuate, margins entire or with 3 broad, apical crenae, apex rounded to acute. |
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. |
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Flowers | pedicels glabrous or nearly so; receptacle glabrous; sepals 5-8 × 3-7 mm, abaxially glabrous or sparsely pilose, hairs colorless; petals 5-10, 8-13 × 5-12 mm; nectary scale glabrous or ciliate. |
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. |
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Heads of achenes | globose, 7-12(-20) × 6-11(-20) mm; achenes 1.4-2.2 × 1.1-1.8 mm, usually finely pubescent; beak subulate or lance-subulate, straight or curved, 0.4-1 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. |
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2n | = 16. |
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Ranunculus glaberrimus |
Ranunculus micranthus |
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Phenology | Flowering spring (Mar–May). | |||||
Habitat | Woods, meadows, and clearings | |||||
Elevation | 0-1000 m (0-3300 ft) | |||||
Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; SK
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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 | Varieties 2 (2 in the flora). Usually only a minority of the ovaries develop, and the fruiting receptacle is completely hidden by aborted ovaries. Populations growing at high elevations (Ranunculus glaberrimus var. ellipticus) and low elevations (var. glaberrimus) are usually well differentiated, but these varieties intergrade at intermediate elevations. The Thompson Indians rubbed the flowers or the whole plant of Ranunculus glaberrimus on arrow points as a poison (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. micranthus var. cymbalistes, R. micranthus var. delitescens | |||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 12. (1829) | Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 18. (1838) | ||||
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