Herbs, decumbent, often rooting at basal nodes. Leaves petiolate. Inflorescences terminal, spikes or sometimes in panicles with spicate branches, bracteate; bracteoles 2. Calyx 5-lobed. Corolla tube short, distally slightly enlarged into a throat; limb 2-lipped; lower lip 3-lobed, lobes subequal; upper lip 2-cleft, lacking a stylar furrow (so far as known); lobes ascending cochlear in bud. Stamens 2, inserted slightly above throat; anthers 2-thecous; thecae equally to subequally inserted, parallel, subequal, base muticous; staminodes absent. Disk without an annulus. Capsule unknown.
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