Flora of North America species comparison

sometimes fleshy and ± tuberous.

dimorphic, some filiform, 0.2-0.6 mm thick and some with tuberous bases 1-2 mm thick.

nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous.

erect, 11-40 cm, villous, each with 8-35 flowers.

blades narrowly ovate to oblong or semicircular in outline, simple to 3-5-lobed or -foliolate, 2.8-12.5 × 2.5-14 cm, leaflets or segments undivided or 1-2x-lobed or -parted, ultimate segments circular to linear, margins dentate, crenate, or entire, apex rounded to narrowly acute.

persistent, blades ovate, orbiculate, or transversely elliptic, outer blades undivided, inner 3-parted or 3-foliolate, 1-3.3 × 1-3 cm, base truncate to broadly obtuse or sometimes weakly cordate, margins crenate, apex rounded-obtuse.

receptacle hispid;

sepals reflexed 1-2 mm above base, 5-11 × 2-4 mm, hispid, hirsute, or glabrous;

petals 5-6, abaxially yellow or red, adaxially yellow, 8-18 × 4-11 mm.

pedicels glabrous or villous;

receptacle glabrous;

sepals 2-4 × 1-1.5 mm, abaxially glabrous or pubescent, hairs colorless;

petals 5, 1.5-3.5 × 0.5-1.5 mm;

nectary scale glabrous.

hemispheric to ovoid, 5-13 × 6-10 mm;

achenes 2.8-4.5 × 1.8-3.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, narrowly lanceolate to subulate, straight, 1.8-3.8(-4.8) mm.

globose to cylindric, 3-7 × 2-4 mm;

achenes 1.1-1.5 × 1-1.3 mm, glabrous;

beak subulate, straight or curved, 0.2-0.3 mm.

= 16.