Ranunculus glacialis
glacier buttercup
erect or ascending from caudices, not rooting nodally, distally glabrous or brown-pilose, not bulbous-based.
reniform to broadly triangular in outline, 3-foliolate or deeply 3-parted, 1-4 × 1.6-4.4 cm, leaflets or segments 1-2x-parted, ultimate segments elliptic to oblanceolate or almost linear, margins entire or occasionally with 1-2 teeth, apex rounded to obtuse.
receptacle glabrous or brown-pilose;
sepals spreading, 7-12 × 4-9 mm, brown-pilose;
petals initially white, usually becoming red with age, 9-15 × 7-14(-18) mm.
roots absent.
heads hemispheric, 5-8 × 7-16 mm;
fruit wall smooth, not veined, loose but not inflated, winged along suture, fruits winged achenes;
achenes 2.6-3 × 1.4-2 mm, glabrous;
beak persistent, lanceolate, 0.8-2.3 mm.
Ranunculus glacialis
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Stems glabrous or with few hairs at nodes; caudices well-developed; basal leaves compound, ultimate segments elliptic to oblanceolate; receptacle glabrous; Greenland. | var. glacialis |
1. Stems distally brown-pilose; caudices short; basal leaves deeply parted or compound, ultimate segments oblanceolate to almost linear; receptacle brown-pilose; Alaska. | var. camissonis |
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