Flora of North America species comparison

cylindric, 2-3 mm thick.

erect, glabrous, rooting at base, only very rarely rooting at proximal nodes.

prostrate or ascending, 5-20 cm, glabrous, each with 1-6 flowers.

basal and cauline, basal and proximal cauline leaf blades reniform to semicircular in outline, 3-lobed or -parted, 1-5 × 1.6-6.8 cm, base truncate to cordate, segments usually again lobed or parted, sometimes undivided, margins crenate or crenate-lobulate, apex rounded or occasionally obtuse.

persistent, blades rhombic to deltate or reniform in outline, 3-4x-dissected, 1.1-3.4 × 2-3.1 cm, segments linear, base obtuse, margins crenate, apices of segments narrowly rounded.

receptacle pubescent or glabrous;

sepals 3-5, reflexed from or near base, 2-5 × 1-3 mm, glabrous or sparsely hirsute;

petals 3-5, 2-5 × 1-3 mm;

nectary on petal surface, scale poorly developed and forming crescent-shaped or circular ridge surrounding but not covering nectary;

style absent.

pedicels glabrous;

receptacle short-pubescent;

sepals 4-8 × 2-5 mm, abaxially glabrous or nearly so;

petals 5, 6-15 × 4-10 mm;

nectary scale glabrous.

ellipsoid or cylindric heads, 5-13 × 3-7 mm;

achenes 1-1.2 × 0.8-1 mm, glabrous;

beak deltate, usually straight, 0.1 mm.

depressed-globose, 4-6 × 5-8 mm;

achenes 1.8-2.2 × 1.2-1.8 mm, finely pubescent;

beak subulate, straight, 0.8-1.5 mm.