Flora of North America species comparison

bark exfoliating in shreds;

nodal diaphragms to 0.5 mm thick;

branchlets terete, glabrous or sparsely hirtellous, growing tips 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 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 3–5 mm;

petiole 1/2 to ± equaling blade;

blade cordate, 6–20 cm, 3-shouldered to shallowly 3-lobed, apex short acuminate, abaxial surface not glaucous, glabrate, visible through hairs, veins and vein axils hirtellous, adaxial surface 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.

(4–)9–12 cm.

3–7 cm.

functionally unisexual.

functionally unisexual.

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

lenticels absent.

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

lenticels usually present.

= 38.

= 38.