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Genus :


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Species of this Genus


Annual or perennial herbs. Leaves stipulate, stipules sheathing, connate with petioles, pectinate, opposite. Flowers hermaphrodite, isostylous. Inflorescence terminal cymes, subtended by an involucre of 2 or 4 leaves. Flowers 3 or 4-merous. Calyx tube turbinate or subglobose, lobes 4-8. Corolla infundibular, lobes 3-6 (-8), valvate. Anthers exserted. Ovary 3-4 locular, ovule 1 per locule, attached to a basal placenta, styles filiform, stigmas 3-4. Fruit a capsule, with 3-4 cocci, usually separating.