Flora of North America species comparison

green, glabrous to densely pilose.

blade 6-12 × 7-14 cm, membranous to nearly leathery;

venation 7.

blade usually reniform, sometimes nearly orbiculate, base cordate to truncate, margins entire, apex acute to rounded, often retuse, mucronate;

surfaces abaxially pale, pilose to densely pilose, adaxially glabrous to pilose.

pistillate inflorescences fascicles from axils of normal leaves, individual flowers in axils of reduced leaves or bracts upon secondary axillary branches.

2-ranked;

sepals 4;

petals 4, connate, corolla cup-shaped;

stamens 4;

anthers on column formed by fused filaments, 1-locular, dehiscing transversely.

sepals obovate, 1.2-1.4 × 0.8-1 mm;

petals 4-angulate to deltate, 0.4-0.8 × 1-1.6 mm;

ovary to 0.8 mm.

sepal 1, obovate, abaxially pubescent;

petal 1;

staminodes absent;

pistil 1;

ovary asymmetrically pouched, pilose [or glabrous];

stigma 3-5-lobed.

not seen.

nearly globose, pubescent;

endocarp bony, warty, ribbed.]

, from thickened root.

, twining or clambering.

inflorescences not seen.

inflorescences axillary, multiflowered cymes from normal leaves, reduced leaves, or bracts.

inflorescences to 13 cm;

bracts sessile or shortly petiolate, usually reniform, to 5 × 6 mm, grading to minute, membranous, glabrous to densely pilose.