Flora of North America species comparison

(3–)4–10(–12) dm, pubescent or, rarely, glabrate.

petiole (1.5–)3–10(–17) cm;

blade broadly cordate to narrowly cordate-ovate, (1.5–)3–12(–18) × (1–)2–8(–12) cm, base cordate, often pubescent.

similar to basal, petiole shorter (distal sessile);

blade (proximal opposite, distal alternate), smaller distally.

sepals (5–)6–9(–10) × 1–2 mm;

petals (15–)17–25(–30) × 5–10 mm, claw 5–10 mm;

filaments 5–8 mm;

anthers oblong, 2–3 mm;

gynophore relatively slender, 7–18 mm.

(7–)10–15 mm, glabrous or pubescent.

3–4.5(–5) × 2–3(–3.5) cm, strongly latiseptate;

valves each rounded basally and apically;

replum glabrous or sparsely ciliate;

style 4–10 mm.

grayish brown, (6–)7–10(–12) × 5–9 mm.

= 30.