Flora of North America species comparison

bark exfoliating in plates;

nodal diaphragms 1.5–3 mm thick;

branchlets slightly angled when young, becoming terete, arachnoid or arachnoid-floccose, sometimes glabrescent, growing tips not enveloped by unfolding leaves;

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.

bark exfoliating in shreds;

nodal diaphragms 0.5–2.5 mm thick;

branchlets terete, densely tomentose to arachnoid-floccose or glabrous, sometimes with spinose, gland-tipped hairs, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, branched, tendrils (or inflorescences) at almost all nodes;

nodes not red-banded.

stipules 1.5–3 mm;

petiole 1/2 to ± equaling blade;

blade cordate to cordate-ovate, 5–12 cm, usually unlobed to 3-shouldered, sometimes shallowly 3-lobed, apex acute to acuminate, abaxial surface not glaucous, moderately to sparsely arachnoid, visible through hairs, veins and vein axils sometimes only hirtellous, adaxial surface sparsely arachnoid or glabrous.

stipules 2–4 mm;

petiole ± equaling blade;

blade cordate, usually 3-shouldered, sometimes unlobed or deeply 3(–5)-lobed, 10–20 cm, apex usually acute, abaxial surface not glaucous, densely and persistently arachnoid, concealed (except sometimes veins) by hairs, adaxial surfaces glabrous or sparsely pubescent.

4–12 cm.

6–14 cm.

functionally unisexual.

functionally unisexual.

black, slightly or not glaucous, globose, 6–10 mm diam., skin separating from pulp;

lenticels absent.

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

lenticels absent.

= 38.

= 38.