Flora of North America species comparison

slender, 0.8-1.8 mm thick.

erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers.

prostrate or sometimes floating, glabrous or hirsute, rooting nodally.

basal leaves absent, cauline leaf blades reniform to circular, 3-parted, 0.6-6.5 × 1.1-9 cm, base cordate, segments again 1-3x-lobed to -dissected, margins entire or crenate, apex rounded to filiform.

persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded.

pedicels pilose;

receptacle pilose;

sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless;

petals 5, 6-8 × 2-4 mm;

nectary scale glabrous.

receptacle sparsely hispid;

sepals 4-5, spreading or reflexed from base, 2-5 × 2-4 mm, glabrous or sparsely pilose;

petals 4-14, 3-7 × 2-5 mm;

nectary scale variable, crescent-shaped, funnel-shaped, or flaplike;

style 0.2-0.4 mm.

depressed-globose, 4-6 × 5-7 mm;

achenes 1.8-2.2 × 1.2-1.8 mm, glabrous;

beak slender, curved, 0.2-0.3 mm.

globose or ovoid, 3-8 × 3-7 mm;

achenes 1-1.6 × 1-1.2 mm, glabrous;

beak narrowly lanceolate or filiform, 0.4-0.8 mm.

= 16.

= 16, 32, 64.