Flora of North America species comparison

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

erect or ascending from caudices, not rooting nodally, distally glabrous or brown-pilose, not bulbous-based.

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.

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.

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.

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.

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.

= 16.