Ranunculus sardous |
Ranunculus hydrocharoides |
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hairy buttercup, hairy crowfoot |
frog's-bit buttercup, frogbit buttercup |
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Roots | not thickened basally, glabrous. |
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Stems | nearly erect, hispid, base not bulbous. |
erect to prostrate, usually rooting nodally, glabrous or strigose. |
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 | pedicellate; receptacle pilose; sepals 5, reflexed, 3-8 × 1.5-3 mm, pilose; petals 5, 7-10 × 4-8 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 | globose or ovoid, 5-8 × 6-7 mm; achenes 15-35 per head, 2-3 × 2-3 mm, faces sparsely papillate or sometimes smooth, glabrous, margin smooth; beak oblong to deltate, curved, 0.4-0.7 mm. |
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. |
Basal | and lower cauline leaf blades ovate to cordate, 3-foliolate, 2-6 × 2-6 cm, leaflets again parted, leaflet base truncate to acute, margins crenate-dentate to crenate-lobulate, apex rounded to obtuse. |
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Ranunculus sardous |
Ranunculus hydrocharoides |
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Phenology | Flowering late winter–summer (Mar–Aug). | Flowering late spring–summer (Jun–Aug). |
Habitat | Roadsides, fields, open woods | Wet soil or shallow water, in marshes and edges of streams and lakes |
Elevation | 0-200 m (0-700 ft) | 2000-2900 m (6600-9500 ft) |
Distribution |
AL; AR; CA; FL; GA; IL; KS; KY; LA; MD; MO; MS; NC; NJ; NY; OK; OR; PA; RI; SC; TN; TX; VA; BC; native to Europe; 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 sardous was collected in New Brunswick and Ontario in the 1800s, but it apparently has not persisted in those provinces. (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. Echinella | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula |
Sibling taxa | ||
Synonyms | R. parvulus | R. hydrocharoides var. stolonifer |
Name authority | Crantz: Stirp. Austr. Fasc. 2: 84. (1763) | A. Gray: Mem. Amer. Acad. Arts, ser. 2, 5: 306. (1855) |
Web links |
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