Perennial herbs or subshrubs with a sparse eglandular indumentum. Leaves undivided, crenate to serrate, petiolate or sessile. Verticillasters 4-6-flowered in terminal or lateral racemes. Bracts small. Flowers white, lilac to purplish. Calyx small in flower, enlarging and deflexed in fruit, ovate to tubular; upper lip 1, large, ovate, recurved with decurrent margins; 4 lower teeth subulate - attenuate, curved, 2 long, 2 short; throat of calyx without a villous ring of hairs. Corolla bilabiate; upper lip 3-4-fid; lower entire ± cucullate; tube exserted from calyx or not, rather slender. Stamens 4, declinate; filaments without teeth or appendages; thecae unilocular by fusion. Style with a capitate-clavate slightly notched stigma. Nutlets ovoid, finely punctulate.