Flora of North America species comparison

cylindric, 1-3 mm thick.

prostrate or ascending, 4-15 cm, glabrous, each with 1-4 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 reniform or obovate to very narrowly elliptic, 0.7-5.2 × 1-2 cm, base truncate, obtuse or attenuate, margins entire or with 3 broad, apical crenae, apex rounded to acute.

pedicels glabrous or nearly so;

receptacle glabrous;

sepals 5-8 × 3-7 mm, abaxially glabrous or sparsely pilose, hairs colorless;

petals 5-10, 8-13 × 5-12 mm;

nectary scale glabrous or ciliate.

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.

globose, 7-12(-20) × 6-11(-20) mm;

achenes 1.4-2.2 × 1.1-1.8 mm, usually finely pubescent;

beak subulate or lance-subulate, straight or curved, 0.4-1 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, 32, 64.