Flora of North America species comparison

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.

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.

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.

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.

3–8(–10) cm.

6–18 cm.

functionally unisexual.

functionally unisexual.

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

lenticels present.

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

lenticels absent.

= 38.