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 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 1.5–3 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 1/2–2/3 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.

9–19 cm.

3–7(–9) 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, 8–12 mm diam., skin separating from pulp;

lenticels absent.

= 38.

= 38.