Flora of North America species comparison

branchlets terete to slightly angled, usually sparsely grayish arachnoid, glabrescent, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes sometimes red-banded.

bark tardily exfoliating in plates;

nodal diaphragms to 0.5(–1) mm thick;

branchlets terete, whitish arachnoid or glabrate, growing tips enveloped by unfolding leaves, sparsely to densely hairy;

tendrils along length of branchlets, soon deciduous if not attached to support, branched, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.

stipules 1–2 mm;

petiole mostly ± equaling blade;

blade cordate to nearly reniform, 2–12 cm, rarely lobed, apex short acuminate, abaxial surface not glaucous, glabrous, visible through hairs, veins and vein axils sometimes sparsely to densely hirtellous, adaxial surface glabrous.

stipules 3–6 mm;

petiole 1/2–2/3 blade;

blade broadly cordate, 7–12 cm, usually 3-shouldered to shallowly 3-lobed, apex usually short acuminate, abaxial surface not glaucous, sparsely arachnoid to glabrate, visible through hairs, veins sparsely hirtellous, adaxial surface slightly arachnoid to glabrate.

3–8(–10) cm.

3–7(–9) cm.

functionally unisexual.

functionally unisexual.

usually black or purplish, sometimes bronze when ripe, glaucous, globose, 8–25 mm diam., skin separating from pulp;

lenticels present.

black, heavily glaucous, globose, 8–12 mm diam., skin separating from pulp;

lenticels absent.

= 38.