Flora of North America species comparison

slender, 0.7-1.3 mm thick.

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

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

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 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.

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.

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.