Ranunculus rhomboideus |
Ranunculus abortivus |
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Labrador buttercup, prairie buttercup, prairie crowfoot |
kidney-leaf buttercup, kidney-leaf crowfoot, little-leaf buttercup, small-flower buttercup, small-flower crowfoot |
|
Roots | slender, 0.8-1.8 mm thick. |
filiform, sometimes enlarged basally, 0.5-1.5 mm thick. |
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect or nearly erect, 10-60 cm, glabrous, each with 3-50 flowers. |
Basal leaves | persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded. |
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. |
Flowers | pedicels pilose; receptacle pilose; sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless; petals 5, 6-8 × 2-4 mm; nectary scale 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. |
Heads of achenes | depressed-globose, 4-6 × 5-7 mm; achenes 1.8-2.2 × 1.2-1.8 mm, glabrous; beak slender, curved, 0.2-0.3 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. |
2n | = 16. |
= 16. |
Ranunculus rhomboideus |
Ranunculus abortivus |
|
Phenology | Flowering spring (Apr–Jun). | Flowering late winter–summer (Mar–Jul). |
Habitat | Prairies, or occasionally open woods or thickets | Woods, meadows, fallow fields, and clearings |
Elevation | 0-900 m (0-3000 ft) | 0-3100 m (0-10200 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
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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 | In addition to the range given above, L. D. Benson (1948) cited nineteenth-century specimens from Quebec, New York, Massachusetts, and Rhode Island. No modern specimens have been seen from those areas. (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.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | R. abortivus subsp. acrolasius, R. abortivus var. acrolasius, R. abortivus var. eucyclus, R. abortivus var. indivisus | |
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Linnaeus: Sp. Pl. 1: 551. (1753) |
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