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.

bark tardily exfoliating in shreds;

nodal diaphragms 1–2 mm thick;

branchlets terete, densely tomentose to glabrate, growing tips not enveloped by unfolding leaves;

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

nodes not 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 3–6 mm;

petiole 1/2 blade;

blade cordate, 5–15 cm, usually 3-shouldered to shallowly 3-lobed, apex acute to short acuminate, abaxial surface not glaucous, moderately to densely arachnoid, visible through hairs, veins hirtellous, adaxial surface sparsely to moderately arachnoid.

9–19 cm.

4–10 cm.

functionally unisexual.

functionally unisexual.

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

lenticels absent.

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

lenticels absent.

= 38.

= 38.