Herb to 1.5 m, variably pubescent with glandular and non-glandular hairs. Leaves radical and cauline or mostly radical, usually elliptic, petiolate, the upper ones lanceolate or linear and often sessile; lamina up to 28 cm long; petiole to 15 cm long, usually narrowly winged, the base occasionally stem-clasping. Inflorescence panicle-like, usually few-branched. Calyx 5–17 mm long. Corolla-tube 11–35 mm long, 1–5 mm wide at top of calyx, distinctly narrowed at base; limb 7–30 mm diam., the lobes obtuse or notched. Upper 4 anthers at about the same level, their filaments to 3.5 mm long; filament of the 5th stamen 5–10 mm long, inserted in lower half of corolla-tube. Capsule ellipsoid to ovoid-ellipsoid, 5–11 mm long. Seeds mostly |C-shaped; testa usually wrinkled.
An extremely common species which grows in sandysoil, often in disturbed areas, frequently on sand dunes and sand banks left byfloods along inland rivers.
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