Flora of North America species comparison

never tuberous.

tuberous, 2.5-5 mm thick.

erect or ascending, never rooting nodally, crisped-pilose, base not bulbous.

erect, 2.5-7.5 cm, glabrous, each with 1-4 flowers.

persistent, blades obdeltate in outline, 1-2.8 cm, segments 0.2-0.6 cm wide, deeply divided into 3 oblanceolate segments with lateral segments often again lobed or parted, base long-attenuate, margins entire, apex rounded.

broadly rhombic to semicircular in outline, 3-parted, 2.8-4.3 × 3-5.5 cm, segments 3-lobed, ultimate segments lanceolate, margins entire or toothed, apex narrowly acute or acuminate.

receptacle glabrous;

sepals reflexed 1 mm above base, 4-6 × 1.5-3 mm, densely pilose;

petals 5, abaxially red, adaxially yellow, 10-12 × 4-6 mm.

pedicels glabrous;

receptacle glabrous or sparsely pilose;

sepals 3-7 × 1.5-3 mm, abaxially glabrous;

petals 5, 6-12 × 2-5 mm;

nectary scale glabrous.

of achenes hemispheric, 4-7 × 7-10 mm;

achenes 3.4-4.2 × 2.8-3.2 mm, sometimes basally pilose, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lance-subulate, straight or somewhat curved distally, 1.6-2.6 mm.

of achenes globose to cylindric, 3.5-8 × 3-7 mm;

achenes 1.1-1.4 × 0.8-1.1 mm, finely pubescent;

beak subulate, straight, 0.2-0.8 mm.