Erect annual herb, 0.25–2 m. high, bushy or simple-stemmed; glabrous except for the mucilage glands. Leaves heteromorphic; the inferior 3–foliate or 3–partite, sometimes with 1–2 additional irregular lateral segments, central lobe longest, 2–10 cm. long, with the leaflets or segments up to 2 cm. broad; superior leaves simple. Extra-floral nectaries (in the Flora Zambesiaca area) usually single. Calyx deciduous. Corolla 2.5–4 cm. long, more or less funnel-shaped, mauve. Capsules oblong in lateral view, abaxially gibbous at the base, c. 40 x 5–7 mm.; beak 6–8 mm. long, distinctly bent outwards (TAB. 23 fig. F); loculi sometimes with inconspicuous ribs. Seeds more or less horizontal in the loculi, about 2.5 mm. x 1.7 mm.; wings, especially the two basal ones, inconspicuous; testa faveolate (TAB. 25. fig. F2).