Ranunculus pallasii |
Ranunculus ficaria |
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Pallas' buttercup, renoncule de Pallas |
ficaire, fig buttercup, lesser celandine, pilewort, renoncule ficaire |
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Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
erect to decumbent, not rooting nodally, glabrous, not bulbous-based, spheric or ellipsoid bulbils sometimes formed in leaf axils. |
Basal leaves | simple and undivided, blades cordate to deltate or semicircular, 1.8-3.7 × 2-4 cm, base cordate, margins entire or crenate, apex rounded or obtuse. |
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Basal leaf blades | linear to obovate, undivided or 3-lobed, 1.5-3.6 × 0.3-2 cm, lobes lanceolate or elliptic, margins entire, apex rounded to acuminate. |
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Flowers | receptacle glabrous; sepals spreading, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 mm. |
receptacle glabrous; sepals spreading, saccate at extreme base, 4-9 × 3-6 mm, glabrous; petals yellow, 10-15 × 3-7 mm. |
Heads of achenes | globose or hemispheric, 5-12 × 9-15 mm; achenes 4.2-5.2 × 2.4-3.2 mm, glabrous; beak persistent, lanceolate, straight or curved, 1-1.2 mm. |
hemispheric, 4-5 × 6-8 mm; achenes 2.6-2.8 × 1.8-2 mm, pubescent; beak absent. |
Tuberous | roots absent. |
roots present. |
2n | = 32. |
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Ranunculus pallasii |
Ranunculus ficaria |
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Phenology | Flowering summer (Jul–Aug). | Flowering spring (Apr–May). |
Habitat | Shallow water of bogs and pools in muskeg and tundra | Shaded stream banks and moist disturbed areas |
Elevation | 0-700 m (0-2300 ft) | 0-300 m (0-1000 ft) |
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
CT; DC; IL; KY; MA; MD; MI; MO; NJ; NY; OH; OR; PA; RI; TN; VA; WA; WV; BC; NF; ON; QC; native to Europe [Introduced in North America]
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Discussion | In North America, Ranunculus ficaria seems to be expanding its range rapidly in areas with cool mesic climates. The species is extremely variable (especially in leaf size and stem posture), and many attempts have been made to divide it into varieties or subspecies (see P. D. Sell 1994). The different forms, however, intergrade extensively and the varieties are often impossible to distinguish. (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. Pallasiantha | Ranunculaceae > Ranunculus > subg. Ficaria |
Sibling taxa | ||
Synonyms | R. ficaria subsp. bulbifer, R. ficaria subsp. calthifolius, R. ficaria var. bulbifera | |
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | Linnaeus: Sp. Pl. 1: 550. (1753) |
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