Erect perennial to 70 cm high. Branches slender, terminal ones sometimes compressed, smooth or uppermost glandular-aculeate. Leaves narrowly oblong to elliptic or obovate or upper ones terete, sometimes dilated at base, 1.5–5 cm long, shorter than internodes, entire, glabrous. Flowers in terminal open cymes; bracts and bracteoles small; pedicels slender, ±medially bibracteolate, glandular-aculeate. Sepals ovate to narrowly ovate, c. 3 mm long, acute or acuminate, glabrous or glandular-aculeate at base, red, caducous. Petals elliptic, 7–11 mm long, glabrous, pink. Stamens: filaments narrowly oblong, verrucose and pilose abaxially; anthers minutely apiculate. Ovary pilose; style terete, c. 1 mm long, pilose; stigma small.
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