Flora of North America species comparison

never tuberous.

dimorphic, some filiform, 0.2-0.6 mm thick and some with tuberous bases 1-2 mm thick.

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

erect, 11-40 cm, villous, each with 8-35 flowers.

persistent, blades ovate, orbiculate, or transversely elliptic, outer blades undivided, inner 3-parted or 3-foliolate, 1-3.3 × 1-3 cm, base truncate to broadly obtuse or sometimes weakly cordate, margins crenate, apex rounded-obtuse.

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 or villous;

receptacle glabrous;

sepals 2-4 × 1-1.5 mm, abaxially glabrous or pubescent, hairs colorless;

petals 5, 1.5-3.5 × 0.5-1.5 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, 3-7 × 2-4 mm;

achenes 1.1-1.5 × 1-1.3 mm, glabrous;

beak subulate, straight or curved, 0.2-0.3 mm.

= 16.