Tender, ± rosetted, glabrous perennial (?or annual), to c. 20 cm high. Leaves cauline and basal, ovate, elliptic or obovate, shortly petiolate, 1–4 cm long, 8–20 mm wide, thin-textured, light green, apex rounded. Flowers in an elongating leafless raceme, to c. 12 cm long; pedicels slender, to c. 1 cm long, each with a linear bract c. 1 mm long shortly below midway; calyx hemispherical, 1–1.5 mm long at anthesis (rapidly enlarging to c. 3 mm in fruit), lobes broadly acute or obtuse, one-third to half as long as calyx; corolla lobes blunt, spreading, exceeding calyx by c. 0.5 mm, free shortly above base, white; stamens and staminodes inserted at throat of corolla. Capsule c. spherical, c. 2 mm diam. Flowers mainly Nov.–Mar.