Flora of North America species comparison

creeping or floating, rooting nodally, glabrous, not bulbous-based.

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

basal leaf blades semicircular or reniform in outline, shallowly 5-7-lobed, 1.2-4.6 × 1.8-6.6 cm, ultimate segments semicircular, margins crenate, apex rounded or weakly apiculate;

cauline leaves 0-2, scalelike.

linear to obovate, undivided or 3-lobed, 1.5-3.6 × 0.3-2 cm, lobes lanceolate or elliptic, margins entire, apex rounded to acuminate.

receptacle glabrous;

sepals spreading, 6-10 × 4-7 mm, glabrous;

petals 7-11, white or pink, 8-13 × 3-6 mm.

receptacle glabrous;

sepals spreading, white or pale yellow, 6-13 × 3-6 mm, glabrous;

petals 8-12, greenish, 2-4 × 0.6-1.6 mm.

globose or hemispheric, 5-12 × 9-15 mm;

achenes 4.2-5.2 × 2.4-3.2 mm, glabrous;

beak persistent, lanceolate, straight or curved, 1-1.2 mm.

ovoid, 6-7 × 6-8 mm;

achenes 3.8-4.2 × 0.8-1 mm, canescent;

beak persistent, filiform, 1.2-1.4 mm, hooked distally.

roots absent.

roots absent.

= 32.