Flora of North America species comparison

bark exfoliating in shreds or plates;

nodal diaphragms 3–5 mm thick;

branchlets terete to slightly angled, pubescent, sometimes glabrescent, growing tips not enveloped by unfolding leaves;

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

nodes not red-banded.

bark exfoliating in shreds;

nodal diaphragms 1–2.5 mm thick;

branchlets gray to green or brown, if purplish only on one side, terete, sparsely arachnoid or glabrous, growing tips not enveloped by unfolding leaves, sparsely to densely hairy;

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

nodes not red-banded.

stipules usually more than 3.5 mm;

petiole ± equaling blade;

blade cordate-ovate to cordate-orbiculate, 12–20 cm, usually 3-shouldered to 3–5-lobed, sometimes deeply so, apex acute to short acuminate, abaxial surface not glaucous, sparsely pubescent to glabrate, visible through hairs, adaxial surface usually glabrous.

stipules 1.5–3 mm;

petiole 1/2 blade;

blade cordate, 5–8(–10) cm, unlobed or shallowly 3-lobed, apex acute to short acuminate, abaxial surface not glaucous, glabrous or sparsely hirtellous, visible through hairs, adaxial surface usually glabrous.

10–20 cm.

3–7 cm.

bisexual.

functionally unisexual.

usually reddish purple to nearly black, sometimes yellow-green, ± glaucous, oblong to ellipsoid, 8–25 mm diam., skin adhering to pulp;

lenticels absent.

black, usually not, sometimes very slightly, glaucous, globose, 8–10 mm diam., skin separating from pulp;

lenticels usually present.

= 38, 76.

= 38.