Herbs to 80 cm tall, branched, glabrous throughout. Petiole 1-2 mm; leaf blade linear-lanceolate, 4-16 × 0.5-2 cm, midvein prominent on both sides, lateral veins obsolete. Cymes subsessile, much shorter than leaves, racemelike, 4-8-flowered. Pedicel 0.3-2 cm. Sepals lanceolate, 1.5-3 × ca. 1 mm. Corolla white; tube short; lobes linear-lanceolate, 0.6-1.5 cm × ca. 2 mm. Corona lobes white, thick, margin denticulate. Anthers laterally flattened; pollinia attached to caudicle at middle, retinaculum ca. 1/3 size of pollinia. Follicles cylindric-lanceolate, 5-7.5 cm × ca. 3 mm. Seeds minute, coma ca. 1.5 cm. fl Apr-Oct, fr. Jul-Dec.
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