Flora of North America species comparison

simple or branched distally, (1.5–)3–9(–13) dm; glabrous or pilose basally, trichomes to 1.5 mm.

petiole 3–16(–22) cm;

blade reniform or cordate, (6–)15–88(–118) mm wide (shorter in length), surfaces glabrous or pilose.

petiole shorter than basal;

blade ovate, cordate, or deltate, to 15 × 15 cm, base cordate or truncate, margins acutely to obtusely toothed, apex acute.

several-flowered.

sepals (2–)2.5–3.5(–4.5) × 0.7–1.5 mm;

petals (2.5–)4–8(–9) × (1.5–)2–3(–3.5) mm, base attenuate to clawlike;

filaments 2–3.5(–4.5) mm;

anthers oblong, 0.7–1 mm.

terete, (2–)3–10(–15) mm.

divaricate-ascending, subtorulose, quadrangular or subterete, (2–)3–7(–8) cm × 1.2–2.5 mm;

style (0.2–)1–2(–3) mm.

dark brown or black, narrowly oblong, 2–4.5 × 0.7–2 mm.

= 42.