Flora of North America species comparison

stipules 4–12 mm;

petiole 6–22 cm, with pair of round, sessile, cushion-shaped glands at apex;

blade broadly ovate or triangular-ovate, 10–25 × 8–20 cm, usually unlobed, sometimes shallowly 3-lobed, base cordate, truncate, or rounded, apex acuminate, both surfaces moderately to sparsely hairy, hairs appressed.

6–15 × 6–20 cm, often branching from near base, branches to 15 cm.

1–2 cm.

sepals green to purplish, 10–12 mm;

petals white or pale pink with dark pink to red veins proximally, sometimes yellow basally, obovate, 25–35(–40) × 15–20 mm, narrowed at base;

nectary glands awl-shaped to strap-shaped;

stamens in outer whorl 8 mm, in inner whorl 13 mm, connate 1/2–2/3 length.

sepals and petals as in staminate flowers;

ovary hairy.

subglobose, 4–6 cm diam., smooth, glabrous or glabrate, short stipitate, apex apiculate.

2.5–3 × 2 cm, surface warty, ridged.

= 22 (China).