Much-branched shrub to 50 cm high. Branchlets glabrous or puberulous; decurrent leaf bases absent. Leaves subopposite to alternate, frequently fasciculate, sessile or with petiole to 0.5 mm long, slender, terete, 5–15 mm long, channelled above, glabrous or sparsely puberulous. Flowers axillary, solitary; pedicel fleshy, 1–2 mm long. Sepals narrowly triangular to triangular or ovate, 1–3 mm long, fleshy with scarious margin, glabrous. Petals broadly elliptic, 3–7 mm long, glabrous, thickened and glandular in medial strip, white, pink or pale blue. Stamens: filaments narrowly oblong, ciliate, sparsely verrucose towards apex; anther c. 1 mm long, usually minutely apiculate. Ovary glabrous; style c. 0.5 mm long, terete, glabrous; stigma barely differentiated to subcapitate.
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