Sesamum angustifolium Engl.

Erect or sometimes spreading, simple or branched herb 30–180 cm. high, stems subquadrangular, sulcate, pubescent to thinly pilose, becoming glabrescent.. Leaves sessile, subsessile or lower ones sometimes shortly petiolate, narrowly linear to linear-lanceolate (rarely oblong-lanceolate), 2–12 cm. long, 0.1–1 cm. (some lower toothed leaves rarely up to 4 cm.) broad, margins entire or rarely undulate, sometimes the lower leaves coarsely and irregularly toothed, thinly pubescent to glabrous above, usually densely glandular below and thinly pubescent on the nerves becoming glabrous, cuneate at the base, acute, subacute or rarely rounded at the apex.. Flowers pink, red, mauve or purple, often spotted within.. Calyx persistent, lobes lanceolate to linear-lanceolate, acuminate, 5–9 mm. long, pubescent.. Corolla 2–3.5 (rarely up to 4) cm. long, 0.9–1.8 (rarely up to 2.3) cm. diameter at the throat, pubescent or rarely glabrescent.. Filaments arising from a band of hairs, anthers 3.5 mm. long, dorsifixed with papillae at the back.. Ovary narrowly oblong-quadrangular, about 4 mm. long, densely adpressed-pubescent.. Capsule narrowly oblong-quadrangular, deeply 4-grooved, rounded at the base, acuminate into a narrow beak at the apex, 1.2–2.4 cm. long, 3–4 mm. broad, thinly pubescent to pilose, beak 1–3.5 mm. long (Fig. 7/15).. Seeds (Fig. 7/16) not winged, thick, about 1.5 mm. long, 1 mm. broad, faces and sides rugose.. Fig. 7/9–16, p. 18.

Waste places and as a weed of cultivation. Common along roadsides, in grassland and as a weed in fields, at elevations from sea-level to 2,000 metres.

Can be grown by seedlings.