Flora of North America species comparison

climbing with tendril-like petioles and leaf rachises, 3-6 m.

herbaceous, ascending to erect, not climbing, 0.6-1.5 m.

blade pinnately 3- or 5-foliolate;

leaflets ovate or broadly lanceolate to narrowly deltate, to 6.5 × 3.5 cm, margins entire;

surfaces abaxially glabrous or very sparingly appressed-strigose on major veins.

blade pinnately 5-9-foliolate;

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

surfaces glabrous.

axillary, 3-12-flowered cymes or compound cymes or paniculate with cymose subunits.

axillary and terminal, many-flowered cymes and panicles.

bisexual, often some unisexual (staminate) in same inflorescence;

pedicel 1-3.5 cm, slender;

sepals wide-spreading, not recurved, white, linear or elliptic to lanceolate or narrowly obovate, 0.9-2.2 cm, length ca. 2-3 times width, abaxially tomentose along margins, adaxially glabrous;

stamens ca. 50;

filaments glabrous;

staminodes absent;

pistils 5-10.

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.

broad, flat, conspicuously rimmed, minutely appressed-silky, sometimes sparsely so;

beak 2-6 cm.

broad, flat, conspicuously rimmed, glabrous;

beak 1.2-2 cm.