Ranunculus alismifolius |
Ranunculus abortivus |
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common water plantain buttercup, kidney-leaf buttercup, plantain-leaf buttercup, water-plantain buttercup |
kidney-leaf buttercup, kidney-leaf crowfoot, little-leaf buttercup, small-flower buttercup, small-flower crowfoot |
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Roots | slender or fusiform-thickened basally, glabrous. |
filiform, sometimes enlarged basally, 0.5-1.5 mm thick. |
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Stems | erect or ascending, not rooting nodally, glabrous or hirsute. |
erect or nearly erect, 10-60 cm, glabrous, each with 3-50 flowers. |
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Leaves | basal leaf blades with base acute; proximal cauline leaf blades lanceolate, ovate, or elliptic, 1.8-14.1 × 0.7-2.9 cm, base acuminate to rounded, margins entire or serrulate, apex obtuse to acuminate. |
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Basal leaves | persistent, blades reniform or orbiculate, undivided or sometimes innermost 3-parted or -foliate, 1.4-4.2 × 2-5.2 cm, base shallowly to deeply cordate, margins crenulate to crenate-lobulate, apex rounded to rounded-obtuse. |
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Inflorescences | bracts lanceolate. |
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Flowers | receptacle glabrous; sepals 5, spreading or reflexed from base, 2-6 × 1-4 mm, glabrous or hirsute; petals 5-12, 5-14 × 2-8 mm; nectary scales glabrous. |
pedicels glabrous or nearly so; receptacle sparsely to very sparsely pilose; sepals 2.5-4 × 1-2 mm, abaxially glabrous; petals 5, 1.5-3.5 × 1-2 mm; nectary scale glabrous. |
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Heads of achenes | hemispheric to globose, 3-7 × 4-8 mm; achenes 1.6-2.8 × 1.2-2 mm, glabrous or rarely hispid; beak lance-subulate, straight or weakly curved, 0.4-1.2 mm. |
ovoid, 3-6 × 2.5-5 mm; achenes 1.4-1.6 × 1-1.5 mm, glabrous; beak subulate, curved, 0.1-0.2 mm. |
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2n | = 16. |
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Ranunculus alismifolius |
Ranunculus abortivus |
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Phenology | Flowering late winter–summer (Mar–Jul). | |||||||||||||||||||||
Habitat | Woods, meadows, fallow fields, and clearings | |||||||||||||||||||||
Elevation | 0-3100 m (0-10200 ft) | |||||||||||||||||||||
Distribution |
CA; CO; ID; MT; NV; OR; UT; WA; WY; BC
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AK; AL; AR; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; SPM
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Discussion | Varieties 6 (6 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Three varieties of Ranunculus abortivus are sometimes recognized. Plants from New England and the northern Appalachians often have thick stems and orbiculate leaves with narrow, deep basal sinuses; this form has been called R. abortivus var. eucyclus. Plants from southeastern Virginia may have the upper bracts merely lobed rather than deeply divided as is usual in R. sect. Epirotes; those have been called R. arbortivus var. indivisus. Native American tribes have used Ranunculus abortivus medicinally for a variety of purposes (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. Flammula | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | ||||||||||||||||||||
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Subordinate taxa | ||||||||||||||||||||||
Synonyms | R. abortivus subsp. acrolasius, R. abortivus var. acrolasius, R. abortivus var. eucyclus, R. abortivus var. indivisus | |||||||||||||||||||||
Name authority | Geyer ex Bentham: Pl. Hartw., 295. (1849) | Linnaeus: Sp. Pl. 1: 551. (1753) | ||||||||||||||||||||
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