Suffruticose herbs, erect or sprawling, the stems stout, sometimes woody, puberulent or glabrous. Leaves opposite, subentire to dentate, the major veins pinnate, the minor venation sometimes conspicuously reticulate; petiole basally clasping, sometimes obsolete. Inflorescence axillary, scapose or racemose cymose, the flowers crowded, the pedicels short in flower, sometimes elongating in fruit, subtended by narrow bracts. Flowers with the calyx 5-lobed part way down, the lobes narrow, the limb campanulate, angled; corolla campanulate, purplish, the upper lip sinuate or retuse margined, the lower lip 3-lobed, the lobes all spreading; stamens 3-4, didynamous, the anthers 2-celled, the staminodes sometimes present; style slender or thick, the stigma capitate or rotate. Capsule ovoid, or globose, glabrous, loculicidal; seeds numerous, angled.
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