Trees or shrubs up to 10 m tall; branchlets pilosulous, tomentulose, or puberulous or rarely glabrescent.
Leaves with blades elliptic, broadly elliptic, ovate, or suborbicular, 5-15 x 2-10 cm, drying membranaceous to thinly papery, densely tomentulose or pilosulous to puberulous or rarely glabrescent, at base cuneate to truncate or occasionally subcordate, at apex rounded to obtuse; secondary veins 7-11 pairs, without domatia or these reduced; petioles 1.2-5 cm long, densely pubescent or occasionally glabrescent; stipules obovate to ligulate, 12-26 cm long, variously pubescent or rarely glabrescent, at apex subacute to usually broadly rounded.
Inflorescences 5-25 x 5-25 cm.
Flowers with hypanthium 1.8-3.3 mm long, densely pilosulous to tomentulose or puberulous; calyx limb 1.3-2.8 mm long, lobed for up to 1/3 of its length, the lobes triangular, acute; corolla salverform, white or usually pink to purple, outside pilosulous or strigillose or occasionally glabrescent, inside densely pubescent in throat and on lobes, tube 9-14 mm long, lobes triangular, 4-6 mm long, acute; anthers 2.8-3.9 mm long; stigmas 1.5-4 mm long.
Fruits capsular, narrowly ellipsoid to nearly cylindrical or sometimes lanceoloid (i.e., widest below the middle), 13-41 x 5-7 mm, stiffly papery, dehiscent from the base (or sometimes immature capsules opening prematurely also from the apex); seeds 8-12 x 2-3 mm, flattened, small, irregularly elliptic to oblong, marginally winged and often irregularly incised or erose.