Flora of North America species comparison

1-2.5(-4) cm diam.

blade often abaxially purple on new leaves, adaxially green to greenish purple, broadly ovate to oblong, 5-25 × 4.5-15 cm, 1.1-1.7 times as long as wide, sinus ca. 1/2 length of midrib, lobes overlapping to divergent and forming V-shaped angle;

surfaces glabrous.

3 cm or more diam.;

sepals 5-6, abaxially green to yellow, adaxially often red-tinged toward base;

petals broadly spatulate and thin, or notched and thickened;

anthers (2-)3-6 mm, shorter than filaments.

purple, dark brown, or rarely green, globose-ovoid, occasionally flask-shaped, 1.5-2.5 cm, strongly ribbed, deeply constricted below stigmatic disk, constriction 5-10 mm diam.;

stigmatic disk red, 8-14 mm diam., with 8-14 shallow crenations;

stigmatic rays 8-15, linear, terminating 0-1.6 mm from margin of disk.

2.5-3.5 mm.