Flora of North America species comparison

dimorphic, flowering stems erect or ascending, stolons prostrate, rooting nodally, glabrous or sparsely hirsute, not bulbous-based.

erect from short caudices, not rooting nodally, glabrous, not bulbous-based.

simple and undivided, blades oblong to cordate or circular, 0.7-3.8 × 0.8-3.2 cm, base rounded to cordate, margins crenate or crenate-serrate, apex rounded.

cordate in outline, ternately 1-2x-compound, 1.5-3.8 × 2.1-3.8 cm, leaflets 2-3x-parted, ultimate segments elliptic to linear, margins entire or with occasional teeth, apex obtuse to acuminate.

receptacle hispid or glabrous;

sepals spreading, 2.5-6 × 1.5-3 mm, glabrous;

petals 5, yellow, 2-7 × 1-3 mm.

receptacle hispid;

sepals spreading, 9-15 × 5-9 mm, glabrous;

petals pinkish white, 12-18 × 9-13 mm.

long-ovoid or cylindric, 6-12 × 4-5(-9) mm;

achenes 1-1.4(-2.2) × 0.8-1.2 mm, glabrous;

beak persistent, conic, straight, 0.1-0.2 mm.

roots absent.

roots absent.

heads globose or depressed-globose, 13-27 × 21-29 mm;

fruit wall veined, inflated, not winged, fruits thus utricles;

utricles 6-12 × 4-6 mm, glabrous;

beak persistent, deltate or subulate from deltate base, 0.2-0.6 mm.

= 16.