Ranunculus orthorhynchus |
Ranunculus flabellaris |
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Bloomer's buttercup, straight-beak buttercup, swamp buttercup |
greater yellow water crowfoot, renoncule à évantails, water buttercup, yellow water-buttercup, yellow water-crowfoot |
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Roots | sometimes fleshy and ± tuberous. |
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Stems | nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous. |
floating or prostrate, glabrous, rooting at proximal nodes. |
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Leaves | basal leaves seldom present, cauline leaf blades semicircular to reniform, 1-6x-lobed, parted, or dissected 1.2-7.3 × 1.9-10.8 cm, base truncate or cordate, segment margins entire or crenate, apex rounded to filiform. |
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Basal leaf | blades narrowly ovate to oblong or semicircular in outline, simple to 3-5-lobed or -foliolate, 2.8-12.5 × 2.5-14 cm, leaflets or segments undivided or 1-2x-lobed or -parted, ultimate segments circular to linear, margins dentate, crenate, or entire, apex rounded to narrowly acute. |
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Flowers | receptacle hispid; sepals reflexed 1-2 mm above base, 5-11 × 2-4 mm, hispid, hirsute, or glabrous; petals 5-6, abaxially yellow or red, adaxially yellow, 8-18 × 4-11 mm. |
receptacle sparsely hispid; sepals 5, spreading or weakly reflexed, 5-7 × 3-6 mm, glabrous; petals 5-6(-14), 7-12 × 5-9 mm; nectary scale variable, crescent-shaped, funnel-shaped, or flaplike; style 0.8-1.2 mm. |
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Heads of achenes | hemispheric to ovoid, 5-13 × 6-10 mm; achenes 2.8-4.5 × 1.8-3.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, narrowly lanceolate to subulate, straight, 1.8-3.8(-4.8) mm. |
ovoid, 8-10 × 7-8 mm; achenes 1.8-2.2 × 1.6-2.2 mm, glabrous; beak lanceolate, straight, 1-1.8 mm. |
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2n | = 32. |
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Ranunculus orthorhynchus |
Ranunculus flabellaris |
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Phenology | Flowering late spring–summer (May–Aug). | |||||||||
Habitat | Shallow water or drying mud | |||||||||
Elevation | 0-1500 m (0-4900 ft) | |||||||||
Distribution |
AK; CA; ID; MT; NV; OR; UT; WA; WY; BC
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AL; AR; CA; CT; DE; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NV; NY; OH; OK; OR; PA; RI; SD; TN; TX; UT; VA; VT; WA; WI; WY; AB; BC; MB; NB; ON; QC
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Discussion | Varieties 3 The first two varieties (Ranunculus orthorhynchus var. orthorhynchus and R. orthorhynchus var. platyphyllus) are rather weak, intergrading extensively in California and Oregon. By contrast, R. orthorhynchus var. bloomeri often grows with the others with little or no intergradation (although intermediate populations are found in some areas), and it has been treated as a distinct species, R. bloomeri, by many taxonomists. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The Fox tribes used Ranunculus flabellaris as a cold remedy and a respiratory aid (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Hecatonia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | R. delphinifolius | |||||||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 21. (1829) | Rafinesque: Amer. Monthly Mag. & Crit. Rev. 2: 344. (1818) | ||||||||
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