Flowers 4-merous. Hypanthium cylindric, prominently 8-ribbed, the ribs somewhat tuberculate or papillose-strigose. Sepals linear-lanceolate, erect, pectinate-ciliate. Petals small, obovate, setose at the apex. Stamens 8, dimorphic; filaments glabrous, very slender; anthers of the outer series oblong-ovoid, somewhat curved, the connective horizontal or declined, arcuate, as long as or longer than the anther, bearing 2 short, blunt, basal, anterior spurs; anthers of the inner series ovoid, straight, truncate, the connective very short, bearing 2 short, blunt, anterior spurs. Ovary free, 4-celled, oblong, glabrous below, tipped with about 8 short setae. Style short, clavate, strongly incurved above to the broad stigma. Hypanthium enlarged and thickened in fruit, with 8 rounded, corky, tuberculate ribs. Capsule oblong, free. Seeds minute, cochleate. Annual, freely branched herb, the leaves soon deciduous, with numerous small pink flowers in leafy cymes.
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