Ranunculus hispidus
Ranunculus orthorhynchus
bristly buttercup, hispid crowfoot, renoncule hispide
Bloomer's buttercup, straight-beak buttercup, swamp buttercup
never tuberous.
sometimes fleshy and ± tuberous.
erect or decumbent, sometimes rooting nodally, hispid or strigose, base not bulbous.
nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous.
blades ovate to deltate in outline, 3-foliolate or outer blades merely 3-parted, 2-13.4 × 2.4-16.8 cm, leaflets undivided to lobed or parted, ultimate segments narrowly elliptic or oblanceolate to circular, margins toothed, apex acuminate to rounded.
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.
receptacle hispid;
sepals spreading or reflexed, 4-10 × 2-5 mm, hispid;
petals 5, yellow, 8-16 × 3-9 mm.
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.
hemispheric to short-ovoid, 6-10 × 7-10 mm;
achenes 2.2-5.2 × 2-3.8 mm, glabrous, margin forming narrow rib or broad wing 0.1-1.2 mm wide;
beak persistent, lance-subulate, straight or somewhat curved, 0.8-2.6 mm.
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.
Ranunculus hispidus
Ranunculus orthorhynchus
Varieties 3
Until recently, the varieties of Ranunculus hispidus were usually treated as distinct species. Arguments for restoring species status to R. hispidus var. nitidus were given by G. L. Nesom (1993).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.)
1. Stems erect or nearly erect, never rooting at nodes. | var. hispidus |
1. Stems decumbent, sometimes rooting at nodes. | → 2 |
2. Sepals spreading or reflexed from base; achene margins 0.1–0.2 mm broad. | var. caricetorum |
2. Sepals reflexed 1 mm above base; achene margins 0.4–1.2 mm broad. | var. nitidus |
1. Basal leaves simple or 3-foliolate, if compound then leaflets undivided, margins crenate; petals retuse. | var. bloomeri |
1. Basal leaves 3–5-foliolate, leaflets lobed or parted, margins entire or dentate; petals truncate or rounded. | → 2 |
2. Heads of achenes hemispheric or sometimes globose, 5–7 mm; petals often abaxially red. | var. orthorhynchus |
2. Heads of achenes globose or ovoid, 8–13 mm; petals yellow. | var. platyphyllus |
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