Annual herb, 20 cm to 1 m tall. Stem erect, glabrous, branched at the base. Leaves alternate, linear to lanceolate, 1-3.5 cm long, 1.5-3 mm broad, 3-nerved. Flowers in corymbose racemes, blue; pedicel 1.5-2 cm long. Sepals imbricate, 5-8 mm long, ovate, acuminate, 3-nerved; margin white. Petals linear to lanceolate, c. 12 mm long, contorted. Stamens 5; staminodes absent; filament c. 8 mm long; anthers 2 mm long, bi-Lobed. Ovary ovoid, styles free, c. 3 mm long; stigma linear, 1.5 mm long. Capsule sub-globose, c. 1 cm long, beaked: seeds c. 5 mm long, ellipsoid, dark brown, shiny.