Flora of North America species comparison

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

erect, not viny, 2-4(-6) dm, pubescent or pilose to ± tomentose or hirsute.

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 elliptic-lanceolate to ovate, unlobed, 3.5-8(-10) × 1.5-5(-6.5) cm, thin, not conspicuously reticulate;

surfaces abaxially glabrous to sparsely (rarely more densely) villous on veins, not glaucous.

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

terminal, flowers solitary;

bracts absent.

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.

narrowly urn-shaped;

sepals purplish, yellowish toward tips, oblong-lanceolate, (1.1-)1.4-3 cm, margins not expanded or less than 1 mm wide, thin, not crispate, tomentose, tips obtuse, spreading to recurved, abaxially silky- to woolly-pubescent.

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

beak 2-6 cm.

bodies pilose;

beak white to pale yellow, (1.5-)2-4(-4.5) cm, plumose.

= 16.