Annual herb, erect, to 30 cm high, papillose. Leaves opposite, linear to narrowly lanceolate, to 7 cm long. Flowers usually in axillary dichasia, sometimes solitary, 6-merous; peduncle to 1.5 cm long; pedicel to 0.5 cm long; bracteoles naviculate, to 4 mm long, with membranous margins. Hypanthium campanulate, 3–5 mm deep, markedly 12-ribbed, plicate in bud; ribs green, white-membranous between; appendages 6, blunt. Sepals 6, erect, triangular, 1–1.5 mm long, pigmented at tips. Petals 6, ovate, to 8 mm long, pink to purple. Stamens 12, inserted basally; anthers exserted. Capsule globose, (1.5–) 3–4 mm diam.; dehiscence irregular.
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