Ranunculus bulbosus |
Ranunculus hydrocharoides |
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bulbous buttercup, bulbous crowfoot, renoncule bulbeuse, St. Anthony's-turnip |
frog's-bit buttercup, frogbit buttercup |
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Roots | never tuberous. |
not thickened basally, glabrous. |
Stems | erect, never rooting nodally, strigose or hirsute, base bulbous and cormlike. |
erect to prostrate, usually rooting nodally, glabrous or strigose. |
Basal leaf | blades ovate to cordate in outline, 3-foliolate, rarely merely deeply divided, 2–5.3 × 2.4–5.4 cm, leaflets 1–2x-lobed, ultimate segments oblong to obovate, margins toothed, apex rounded in outline. |
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Proximal cauline leaf blades | ovate to broadly ovate, 0.8-2.7 × 0.8-1.9 cm, base rounded to weakly cordate, margins entire or dentate, apex rounded or obtuse. |
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Inflorescences | bracts lanceolate to oblanceolate or sometimes ovate. |
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Flowers | receptacle pubescent; sepals reflexed 2–3 mm above base, 6–9 × 2–4 mm, pilose; petals 5, yellow, 9–13 × 8–11 mm. |
receptacle glabrous; sepals 5, spreading or reflexed from base, 1.5-3 × 1-2 mm, glabrous; petals 5-6, 3-5 × 1-2 mm; nectary scales glabrous. |
Heads of achenes | ovoid, 6–9 × 5–7 mm; achenes 2.2–3.2 × 2.2–2.8 mm, glabrous, margin forming narrow rib 0.1–0.2 mm wide; beak persistent, lanceolate to deltate, 0.2–0.8 mm, slender tip hooked when present. |
hemispheric or globose, 2-4 × 3-4 mm; achenes 1.2-1.4 × 1-1.2 mm, glabrous; beak lanceolate to lance-filiform, straight or curved, 0.4-1 mm. |
Ranunculus bulbosus |
Ranunculus hydrocharoides |
|
Phenology | Flowering spring (Apr–Jun). | Flowering late spring–summer (Jun–Aug). |
Habitat | Meadows | Wet soil or shallow water, in marshes and edges of streams and lakes |
Elevation | 0–700 m (0–2300 ft) | 2000-2900 m (6600-9500 ft) |
Distribution |
AL; AR; CA; CT; DC; DE; GA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; NC; NE; NH; NJ; NY; OH; OR; PA; RI; SC; TN; VA; VT; WA; WV; BC; NF; NS; ON; QC; South America; native to Eurasia; Pacific Islands; Australia [Introduced in North America]
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AZ; CA; NM; Mexico; Central America (in Guatemala)
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Discussion | Ranunculus bulbosus is native to Europe and the Near East but has become naturalized in many other parts of the world. It is considered an introduced weed in the flora. The Iroquois used Ranunculus bulbosus as a toothache remede and as a a treatment for venereal disease (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. Ranunculus > sect. Flammula |
Sibling taxa | ||
Synonyms | R. bulbosus var. dissectus, R. bulbosus var. valdepubens | R. hydrocharoides var. stolonifer |
Name authority | Linnaeus: Sp. Pl. 1: 554. (1753) | A. Gray: Mem. Amer. Acad. Arts, ser. 2, 5: 306. (1855) |
Web links |
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