Herbs, half shrubs, or shrubs. Leaves opposite, simple, petiolate, pinnately-nerved. Inflorescences verticils, ca 6-flowered, or loose cymes arranged in panicles, racemes, or spikes, the bracts reflexed or deciduous. Flowers ? pedicellate; calyx campanulate, bilabiate, the upper lip 3-lobed, the middle lobe largest, the lateral lobes pointed or rounded, the lower lip 2-toothed or-lobed; corolla tubular, re-flexed, bilabiate, the upper lip 3-4-lobed, the lower lip boat-shaped or concave and entire; stamens 4, curved into the lower lip, monadelphous, sometimes weakly so, the short tube free from the corolla, the anthers with 2 functional thecae; ovary 4-lobed, the gynobase variously developed, sometimes as a nectary, the style gynobasic, bifid near the tip, the branches equal and acute. Nutlets ca 4, attached at the base, ovoid to ovoid-spherical, smooth.
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Herbs or shrubs. Leaves petiolate, dentate. Verticillasters 6-to many flowered, in racemes or panicles; bracts early deciduous or absent. Flowers pedicellate. Calyx ovoid-campanulate to campanulate, 5-toothed or conspicuously 2-lipped, posterior tooth larger; fruiting calyx dilated, declinate or recurved, throat glabrous or villous. Corolla much exserted, erect or recurved, 2-lipped; upper lip (3-or) 4-lobed, strongly reflexed; lower lip entire, elongated, navicular, narrowed at base. Stamens 4, declinate, included within lower lip; filaments connate or free, rarely adnate to corolla tube; anther cells apex confluent. Style apex equally 2-cleft. Nutlets ovoid to globose, smooth, tuberculate or not.
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