Large puberulent, soft-wooded shrub to c. 3 m high. Petiole mostly 2-12 cm long. Lamina 8-15-(20) × 3-10-(15) cm on adult shoots, larger on strong vegetative shoots, oblong- or narrow-ovate, entire, sometimes ± sinuate; base often strongly asymmetric; apex short-acuminate. Fls pendent, very fragrant at night; pedicels puberulent. Calyx 8-12-(14) cm long, spathaceous, eventually splitting down 1 side to at least 1/2 way; teeth acuminate. Corolla 20-28-(30) cm long (excluding attenuate lobe apices 2-4 cm long), cylindric-funnelform, white, nearly always semi-double with an inner corolla whorl; tube ± broadly cylindric. Filaments hairy in lower 1/2; anthers 2-2.7 cm long. Fr. 10-12 cm long, cylindric-oblong, pendent, puberulent, rarely produced.