Ranunculus pallasii |
Ranunculus ambigens |
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Pallas' buttercup, renoncule de Pallas |
water-plantain crowfoot, waterplantain spearwort |
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Roots | not thickened basally, glabrous or somewhat canescent proximally. |
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Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
erect or ascending, rooting at proximal nodes, glabrous or sparsely hirsute. |
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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Proximal cauline leaf blades | lanceolate, 5.9-12.2 × 1.1-2.4 cm, base rounded-obtuse to acuminate, margins denticulate, apex acuminate. |
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Inflorescences | bracts linear or lanceolate. |
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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 5, spreading or sometimes reflexed from base, 3-5 × 2-3 mm, glabrous; petals 5, 5-8 × 2-3 mm; nectary scales glabrous. |
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. |
short-ovoid to depressed-globose, 5-7 × 4-8 mm; achenes 1.8 × 1.2-1.4 mm, glabrous; beak lanceolate, straight, 0.6-1.2 mm. |
Tuberous | roots absent. |
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2n | = 32. |
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Ranunculus pallasii |
Ranunculus ambigens |
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Phenology | Flowering summer (Jul–Aug). | Flowering late spring–summer (May–Aug). |
Habitat | Shallow water of bogs and pools in muskeg and tundra | Creeks, ponds, ditches, marshes |
Elevation | 0-700 m (0-2300 ft) | 0-700 m (0-2300 ft) |
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
AL; CT; DC; DE; GA; IL; IN; KY; LA; MA; MD; ME; MI; NC; NH; NJ; NY; OH; PA; RI; TN; VA; WV
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Discussion | The name Ranunculus obtusiusculus Rafinesque has been mistakenly used for R. ambigens. (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. Ranunculus > sect. Flammula |
Sibling taxa | ||
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | S. Watson: Bibl. Index N. Amer. Bot. 1: 16. (1878) |
Web links |