Flora of North America species comparison

early deciduous (30–50 cm);

stipules early deciduous, pinnate, 5–15 mm;

petiole 2–4 cm, with pubescent spheroid projections between pinnae pairs;

leaflet blades light green abaxially, elliptic to shortly oblong, 5–10 × 2–4 mm, midrib evident, lateral veins not evident, surfaces initially puberulent.

5–8 cm, jointed apically.

calyx deeply lobed, red inside, 20–25 mm;

lobes subequal and recurving at anthesis, falling with petals, elliptic;

corolla somewhat zygomorphic, 80–100 mm diam.;

petals 40–70 mm, long-clawed, blade obovate to orbiculate;

filaments subequal to petals, tawny-hirsute basally.

persistent, 300–600 × 40–65 mm.

ivory streaked with brown, 20 mm.

= 28.