A herbaceous annual (DECAISNE). Stems twining, almost filiform, glabrous or sparsely pilose with long patent hairs. Leaves broadly ovate, ovate or triangular, (1½-)3-9 by (1-)1½-7 cm, cordate at the base with rounded basal lobes, shortly or long-acuminate at the apex with an acute or ob-tusish, mucronulate acumen; upper and lower surface sparsely or sometimes densely pilose; petiole shorter than the blade, (½-)2-4½ cm, with sparse patent hairs. Inflorescences axillary-peduncle mostly rather short, ½-4 cm, patently pilose, few-flowered at the apex; flowers in an umbellate cyme. Pedicels 5-9 mm, in fruit 10-17 mm. Bracts linear or filiform, the lower ones to 9 mm long, with sparse patent hairs. Sepals herbaceous, subequal, 8-15 mm long, linear, attenuate towards the acute apex, patently hairy in the lower half, the hairs with thickened base, glabrous towards the top. Corolla funnel-shaped, ca 2-2½ cm long, glabrous, violet. Stamens and style included; filaments hairy at the base. Ovary glabrous. Capsule globular, mucronate by the style-base, with a thin straw-coloured pericarp, ca 7-8 mm high, 4-valved. Seeds 4-4½ mm long, black, finely puberulent, mottled brownish and greyish.
Thickets, hedges, waysides, apparently restricted to regions subject to a pronounced dry period, from sea-level to 750 m.
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