Flora of North America species comparison

bark exfoliating in shreds;

nodal diaphragms 2.5–4 mm thick;

branchlets uniformly red, purplish red, or chestnut, subterete, glabrous or very sparsely arachnoid, growing tips not enveloped by unfolding leaves;

tendrils red-pigmented when young, along length of branchlets, persistent, branched, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.

bark exfoliating in shreds;

nodal diaphragms 1.5–3 mm thick;

branchlets subterete to terete, densely to sparsely tomentose, 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 somewhat shorter than blade;

blade usually cordate, 8–14 cm, usually deeply 3(–5)-lobed, apex long acuminate, abaxial surface not glaucous, glabrous, visible, veins and vein axils sometimes hirtellous, adaxial surface glabrous.

stipules 1.5–4 mm;

petiole 1/2–3/4 blade;

blade cordate to nearly reniform, 6–14 cm, usually unlobed but sometimes 3-shouldered or deeply 3–5 lobed, apex acute to obtuse, abaxial surface not glaucous, densely white to rusty tomentose, concealed (except sometimes veins) by hairs, adaxial surface floccose to glabrate.

6–18 cm.

4–10 cm.

functionally unisexual.

functionally unisexual.

bluish black to black, slightly or not glaucous, globose, 8–10 mm diam., skin separating from pulp;

lenticels absent.

usually black, sometimes dark red, slightly or not glaucous, globose, 12+ mm diam., skin separating from pulp;

lenticels absent.

= 38.

= 38.