Ranunculus cymbalaria |
Ranunculus ambigens |
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alkali buttercup, renoncule cymbalaire, seaside buttercup, seaside crowfoot, shore buttercup |
water-plantain crowfoot, waterplantain spearwort |
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Roots | not thickened basally, glabrous or somewhat canescent proximally. |
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Stems | dimorphic, flowering stems erect or ascending, stolons prostrate, rooting nodally, glabrous or sparsely hirsute, not bulbous-based. |
erect or ascending, rooting at proximal nodes, glabrous or sparsely hirsute. |
Basal leaves | simple and undivided, blades oblong to cordate or circular, 0.7-3.8 × 0.8-3.2 cm, base rounded to cordate, margins crenate or crenate-serrate, apex rounded. |
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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 hispid or glabrous; sepals spreading, 2.5-6 × 1.5-3 mm, glabrous; petals 5, yellow, 2-7 × 1-3 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 | long-ovoid or cylindric, 6-12 × 4-5(-9) mm; achenes 1-1.4(-2.2) × 0.8-1.2 mm, glabrous; beak persistent, conic, straight, 0.1-0.2 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 | = 16. |
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Ranunculus cymbalaria |
Ranunculus ambigens |
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Phenology | Flowering late spring–summer (May–Sep). | Flowering late spring–summer (May–Aug). |
Habitat | Creeks, ponds, ditches, marshes | |
Elevation | 0-700 m (0-2300 ft) | |
Distribution |
Bogs; marshes; ditches; stream banks; often saline
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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 | Various Navaho groups used Ranunculus cymbalaria as a venereal aid, an emetic, and a ceremonial medicine. The Kawaiisu used it as a dermatological aid (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The name Ranunculus obtusiusculus Rafinesque has been mistakenly used for R. ambigens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Cyrtorhyncha > sect. Halodes | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula |
Sibling taxa | ||
Synonyms | Halerpestes cymbalaria, R. cymbalaria var. alpinus, R. cymbalaria var. saximontanus | |
Name authority | Pursh: Fl. Amer. Sept. 2: 392. (1814) | S. Watson: Bibl. Index N. Amer. Bot. 1: 16. (1878) |
Web links |