Flora of North America species comparison

0.7-5.5 dm (to 8dm in fruit), base with few petioles persistent from previous year.

basal leaves with petioles 4-25 cm, some leaves reduced to sessile, ovate membranous scales;

cauline leaves 1-3(-5), with broad, clasping, membranous sheaths.

blade deeply palmately divided into (3-)5-7 segments, segments obovate, ± 3-lobed, margins coarsely toothed, often incised.

terminal, 1-3[-7]-flowered open cymes or flowers solitary;

peduncle 2-30 cm;

bracts leaflike, not forming involucre.

2.5-5 cm diam.;

sepals 5-9, spreading, white when fresh (pale yellow to greenish white before anthesis), ovate to obovate or nearly orbiculate, 10-20 mm;

petals 15-25, yellow, 1/2-2/3 length of stamens when pollen shed, 3-6 mm.

bisexual, radially symmetric;

sepals not persistent in fruit, (4-)5-9[-30], white to orange-yellow [orange-red or purplish], ± plane [strongly concave and incurved], elliptic, orbiculate, or obovate, sometimes short-clawed, 10-30 mm;

petals 5-25, distinct, yellow or orange, plane with cupped base of blade, linear-oblong [ovate], ± clawed, 2-10[-40] mm;

nectary within pocketlike base of blade;

stamens 20-75;

filaments filiform;

staminodes absent between stamens and pistils;

pistils 5-28[-50], simple;

ovules 4-5(-9) per pistil;

style present.

follicles, aggregate, sessile, oblong, sides transversely veined;

beak terminal, straight, 2-4 mm.

black or dark brown, faceted to angular, dull or lustrous.

usually 11-14, 8-16 mm including beak;

beak often somewhat recurved, sometimes straight.

=8.

=16.