Flora of North America species comparison

erect, twining, or procumbent.

ribbed, tomentose.

blade ovate to reniform, 9-20 × 8-15 cm, base cordate, sinus depth 1-2 cm, apex obtuse to acute;

surfaces abaxially tomentose;

venation palmate-pinnate.

blade membranous to leathery.

on new growth, axillary, solitary flowers;

peduncle not bracteolate, 1-7 cm.

on new growth or on older stems, axillary, racemes or solitary flowers;

bracts present.

calyx yellow-green, sharply bent;

utricle pendent, globose to cylindric, 0.5-1 × 0.5-0.8 cm;

syrinx absent;

tube bent, cylindric, 1-3 × 0.5 cm;

annulus rugulose;

limb yellow, 3-lobed, lobes triangular, 2 × 2 cm, glabrous;

gynostemium 3-lobed, globose, 3 mm;

anthers 6;

ovary 6-locular, 1-7 cm.

calyx usually mixture of purple, brown, green, or red, bilaterally symmetric, tubular, usually bent or curved, 1- or 3-lobed, not fleshy, base with utricle (basal, inflated portion of calyx surrounding or containing gynostemium);

tube narrowed, sometimes extended proximally as cylindric syrinx (tubular or ringlike structure at juncture of tube and utricle, projecting into utricle cavity) and distally as annulus (circular flange at juncture of tube and limb) on limb;

corolla absent;

stamens 5-6, adnate to styles and stigmas, forming gynostemium;

ovary inferior, 3-, 5-, or 6-locular;

styles 3, 5, or 6, connate in column.

ellipsoid to cylindric, 6-8 × 4-6 cm, dehiscence basipetal;

valves 3;

septa entire, not attached to valves.

dry, dehiscent.

flat, triangular, 1 × 1 cm.

flattened or rounded, sometimes winged.

= 6, 7, 8.

= 28.