Flora of North America species comparison

slender, 0.7-1.3 mm thick.

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

erect from short caudices, 6-15 cm, glabrous or sometimes pilose, each with 1-2 flowers.

persistent, blades narrowly elliptic to lanceolate or oblanceolate, undivided, 1.5-4.5 × 0.5-1.1(-2.8) cm, base acute or long-attenuate, margins entire except for apex, apex truncate or rounded and 3(-5)-toothed.

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.

pedicels glabrous or brown-pilose;

receptacle glabrous;

sepals 6-12 × 2.5-8 mm, abaxially densely brown-pilose;

petals 5(-8), 10-19 × 6-17 mm;

nectary scale glabrous.

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 or cylindric, 5-10 × 4-5.5 mm;

achenes 1.5-1.7 × 1.2-1.3 mm, glabrous;

beak slender, straight or recurved, 0.5-1.5(-2.2) mm.

roots absent.

= 32.