Flora of North America species comparison

scrambling to climbing, 3-4 m. Leaf blade 3-foliolate;

leaflets ovate, largest leaflets usually 3-lobed, 1.5-6 × 1.5-5 cm;

terminal leaflet occasionally 3-cleft, margins usually toothed;

surfaces glabrous or sparsely silky.

herbaceous, ascending to erect, not climbing, 0.6-1.5 m. Leaf blade pinnately 5-9-foliolate;

leaflets lanceolate to ovate, 3-9 × 0.8-4 cm, margins entire;

surfaces glabrous.

axillary, flowers solitary, rarely 3-flowered cymes.

axillary and terminal, many-flowered cymes and panicles.

unisexual;

pedicel (including peduncle) stout, 3.5-11 cm;

sepals wide-spreading, not recurved, white to cream, ovate or elliptic to obovate or oblanceolate, 10-21 mm, abaxially and adaxially pilose;

stamens 50-100;

filaments glabrous;

staminodes absent or 50-100;

pistils 75-100.

bisexual;

pedicel 8-20 mm, slender;

sepals wide-spreading, not recurved, white, oblanceolate to oblong, 8-20 mm, length ca. 4 times width, margins tomentose, otherwise glabrous;

stamens 20-50;

filaments glabrous;

staminodes absent;

pistils 8-25.

asymmetric-ovate, not broadly orbiculate, 3-4 × 1.5-2 mm, not conspicuously rimmed, glabrous;

beak 3.5-5.5 cm.

broad, flat, conspicuously rimmed, glabrous;

beak 1.2-2 cm.

= 16.