Short-lived perennial or annual, up to 1.4 m tall, sparsely hairy, sometimes sticky. Leaves up to 300 mm long, lower elliptic-ovate with winged petioles, upper linear to lanceolate, sessile and auricled. Flowers in racemes, calyx up to 20 mm long, 10-ribbed, corolla narrowly tubular, 40-120 mm long, pale yellow, grey, purplish or greenish brown outside, with cream to lavender limb. Capsule ovoid, up to 16 mm long.
Glabrescent annual or perennial herb, 0.45-1.05 m high. Leaves ovate to lanceolate, sessile. Corolla tube 40-115 mm long, dilated abruptly below mouth, limb 45 mm across, deeply acuminately lobed. Flowers white to lavender inside, purplish grey outside.