The flowers of Sesamum alatum grow solitary from leaf axils. As the leaves are opposite, there may be two flowers at each of the widely spaced nodes. In the photo there are pairs of buds above the open flower and one or two green fruits at each leaf node below it.

The five-lobed corolla is obliquely bell-shaped or laterally symmetrical (zygomorphic); the lower lobe slightly larger with dark red lines streaking across a white patch. The other lobes and rest of the corolla are pale pink to pinkish red. The corolla lobes spread to 1,5 cm in diameter; the tube about 3 cm long.

Flowering happens in summer to mid-autumn. This plant was seen in April at Mjejane (Pooley, 1998; Onderstall, 1996; Germishuizen and Fabian, 1982; iNaturalist).