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50. Ranunculus alismifolius Geyer ex Bentham, Pl. Hartw. 295. 1849.
Stems erect or ascending, not rooting nodally, glabrous or hirsute. Roots slender or fusiform-thickened basally, glabrous. Leaves: basal leaf blades with base acute; proximal cauline leaf blades lanceolate, ovate, or elliptic, 1.8-14.1 × 0.7-2.9 cm, base acuminate to rounded, margins entire or serrulate, apex obtuse to acuminate. Inflorescences: bracts lanceolate. Flowers: receptacle glabrous; sepals 5, spreading or reflexed from base, 2-6 × 1-4 mm, glabrous or hirsute; petals 5-12, 5-14 × 2-8 mm; nectary scales glabrous. Heads of achenes hemispheric to globose, 3-7 × 4-8 mm; achenes 1.6-2.8 × 1.2-2 mm, glabrous or rarely hispid; beak lance-subulate, straight or weakly curved, 0.4-1.2 mm.
Varieties 6 (6 in the flora): North America
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| 1 |
Petals 7–12 on most flowers, 2–3 mm broad. |
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50f var. montanus |
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Petals 4–6(–8), 2–8 mm broad. |
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(2) |
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| 2 (1) |
Stems 3.5–8 mm thick; leaf margins serrulate. |
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50a var. alismifolius |
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Stems 1–3 mm thick; leaf margins entire. |
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(3) |
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| 3 (2) |
Leaf blades ovate or elliptic. |
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50e var. alismellus |
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Leaf blades broadly to narrowly lanceolate. |
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(4) |
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| 4 (3) |
Petals 10–14 mm; California and Nevada. |
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50c var. lemmonii |
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Petals 5–8 mm; widespread. |
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(5) |
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| 5 (4) |
Roots fusiform-thickened proximally; stems and petioles glabrous or pubescent. |
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50d var. davisii |
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Roots not or scarcely fusiform-thickened proximally; stems and petioles glabrous. |
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50b var. hartwegii |
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Lower Taxa
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