Flora of North America species comparison

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

slender, 0.4-1 mm thick.

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

erect from short caudices, 3-20 cm, sparsely pilose to glabrous, each with 1-3 flowers.

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.

persistent, blades transversely elliptic to orbiculate, 1-3 × 1-3 cm, base obtuse to nearly truncate, margins crenate or else blades shallowly 3-lobed with crenate lateral lobes, apex rounded or rounded-apiculate.

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.

pedicels sparsely brown-pilose;

receptacle brown-pilose;

sepals 6-8 × 3-6 mm, abaxially densely brown-hispid;

petals 5(-6), 8-12 × 6-10 mm;

nectary scale glabrous.

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.

ovoid-cylindric or ovoid, 6-7(-9) × 5-6 mm;

achenes 1.8-2.2 × 1.4-1.8 mm, glabrous or sparsely brown-hispid;

beak slender, straight or curved, 0.8-1.4 mm.

= 16.

= 42, ca. 80, ca. 84, 96, ca. 98.