Ranunculus pensylvanicus |
Ranunculus ranunculinus |
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bristly buttercup, bristly crowfoot, Pennsylvania buttercup, renoncule de pennsylvanie |
tadpole buttercup |
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Roots | never tuberous. |
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Stems | erect, never rooting nodally, hispid, base not bulbous. |
erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
Leaves | basal leaf blades ovate to semicircular in outline, ternately or pinnately 2x-compound, 2.4-8.2 × 2-8.5 cm, leaflets parted and again lobed, ultimate segments elliptic to linear, margins entire (or occasionally a lobe reduced to tooth), apex acuminate to rounded. |
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Basal leaf | blades broadly cordate in outline, 3-foliolate, 1.6-7 × 3-9 cm, leaflets cleft, usually deeply so, ultimate segments narrowly elliptic, margins toothed, apex acute. |
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Flowers | receptacle hirsute; sepals reflexed ca. 1 mm above base, 3-5 × 1.5-2 mm, ± hispid; petals 5, yellow, 2-4 × 1-2.5 mm. |
receptacle glabrous; sepals spreading or reflexed from base, 3-6 × 1-3 mm, glabrous; petals (0-)5-6, yellow, 3-8 × 1-3 mm. |
Heads of achenes | cylindric, 9-12 × 5-7 mm; achenes 1.8-2.8 × 1.6-2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, broadly lanceolate or nearly deltate, straight or nearly so, 0.6-0.8 mm. |
hemispheric to globose, 4-5 × 6-7 mm; achenes 2.2-3.6 × 1.2-1.8 mm, glabrous; beak filiform, strongly reflexed from base, 0.8-1.5 mm, brittle, often broken. |
Tuberous | roots absent. |
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2n | = 16. |
= 32. |
Ranunculus pensylvanicus |
Ranunculus ranunculinus |
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Phenology | Flowering late spring–summer (Jun–Aug). | Flowering spring–summer (Apr–Aug). |
Habitat | Stream banks, bogs, moist clearings, depressions in woodlands | Open grassy or brushy slopes |
Elevation | 0-1700 m (0-5600 ft) | 1700-2600 m (5600-8500 ft) |
Distribution |
AK; AZ; CO; CT; DC; DE; IA; ID; IL; IN; MA; MD; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NY; OH; PA; RI; SD; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK
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CO; NM; UT; WY
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Discussion | Ojibwa tribes used Ranunculus pensylvanicus as a hunting medicine; the Potawatomi used it as an astringent for miscellaneous diseases (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | Ranunculaceae > Ranunculus > subg. Cyrtorhyncha > sect. Cyrtorhyncha |
Sibling taxa | ||
Synonyms | Cyrtorhyncha ranunculina | |
Name authority | Linnaeus f.: Suppl. Pl., 272. (1782) | (Nuttall) Rydberg: Bot. Surv. Nebraska 3: 23. (1894) |
Web links |
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