Flora of North America species comparison

bark exfoliating in shreds;

nodal diaphragms 1–2.5 mm thick;

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

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

nodes not red-banded.

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.

stipules 1.5–3 mm;

petiole ± equaling blade;

blade cordate, (5–)9–18 cm, usually unlobed or shallowly 3-lobed, sometimes deeply lobed on ground shoots, apex acute to short acuminate, abaxial surface not glaucous, glabrous, visible, veins and vein axils sometimes hirtellous, adaxial surface usually glabrous, sometimes sparsely hirtellous.

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.

9–19 cm.

3–8(–10) cm.

functionally unisexual.

functionally unisexual.

black, usually not, sometimes very slightly, glaucous, globose, 8–12 mm diam., skin separating from pulp;

lenticels absent.

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

lenticels present.

= 38.