Flora of North America species comparison

not thickened basally, glabrous.

erect or ascending, rooting at most proximal nodes, glabrous.

glabrous.

blade reniform, 0.4-1 × 0.6-1.7 cm, margins shallowly crenate-lobulate, segments rounded.

ovate or lanceolate, 1.2-4.2 × 0.5-1.2 cm, base acute to truncate, margins entire or denticulate, apex acuminate to rounded.

bracts linear to lanceolate or oblanceolate.

receptacle glabrous;

sepals 4-5, spreading or reflexed from base, 1.5-3 × 1-1.5 mm, glabrous or sparsely hirsute;

petals 1-3, 1.5-2 × 0.5-1 mm;

nectary scales glabrous.

receptacle glabrous;

sepals recurved, 1.5-2 × 1-1.5 mm, glabrous;

petals 5, 2-4 × 1-1.5 mm;

style 0.1 mm.

recurved.

hemispheric to cylindric, 2-8 × 2-3 mm;

achenes 1-1.2 × 0.6-0.8 mm, ± tuberculate, glabrous;

beak absent or nearly so, to 0.1 mm.

globose or depressed-globose, 3-4 × 3-4 mm;

achenes 1.2-1.6 × 1-1.2 mm, glabrous;

beak deciduous, sometimes leaving stub to 0.1 mm.

= 16 (Europe).