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.

climbing, 3-6 m. Leaf blade pinnate or 2-ternate, 5-9-foliolate, membranous;

leaflets ovate to lanceolate, largest 4-9 × 2.5-9 cm, surfaces abaxially sparsely to densely pilose, adaxially glabrate;

proximal and lateral leaflets typically 3-cleft, unlobed or few-lobed, margins coarsely toothed or entire, surfaces sparsely pubescent or nearly glabrous; ultimate venation conspicuous.

axillary, flowers solitary, rarely 3-flowered cymes.

axillary, 3-many-flowered simple to compound panicles with central axis.

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.

unisexual;

pedicel slender, 11-13 mm, to 2 cm in fruit;

sepals wide-spreading, not recurved, white to cream, oblong or obovate to oblanceolate, 6-14 × 2-5 mm, abaxially densely white-hairy, adaxially sparsely white-hairy;

stamens ca. 30-50;

staminodes absent or fewer than stamens;

pistils 18-35.

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

beak 3.5-5.5 cm.

ovate, ca. 3.5 × 1.5 mm, conspicuously rimmed, sparsely short hairy;

beak 2.5-3.5 cm.

= 16.