Slender erect, glabrous, perennial to 40 cm high. Branches with decurrent leaf bases faint. Leaves frequently caducous, few, well-spaced, sessile, slender-terete, to 12 mm long, channelled above. Flowers axillary, solitary or in 3-flowered cymes; pedicels 5–10 mm long, somewhat thickened. Sepals narrowly to broadly ovate, 2–2.5 mm long, fleshy in centre. Petals elliptic, 8–12 mm long, obtuse, firm, prominently glandular-punctate, white adaxially, green or pink abaxial particularly in median strip, drying blue. Stamens: filaments filiform, smooth; anthers c. 0.6–1.5 mm long, obtuse, not apiculate. Style slender, 3–4 mm long; stigma subcapitate.