Flora of North America species comparison

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

glabrous.

laminate and filiform-dissected; laminate leaf blades reniform, 3-parted, 0.4-1.1 × 0.7-2.3 cm, segments obovate or fan-shaped, shallowly cleft, margins crenate;

filiform-dissected leaves with stipules gradually tapering upward, connate for their whole length.

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 hispid, rarely glabrous;

sepals spreading or reflexed, 2-4 × 1-2 mm, glabrous;

petals 5, 4-7 × 1-5 mm;

style 0.1-0.8 mm.

usually recurved.

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.

hemispheric to ovoid, 2-4 × 2-5 mm;

achenes 1-2 × 0.8-1.4 mm, glabrous or hispid;

beak persistent, filiform, 0.1-1.2 mm.

roots absent.

= 32.