Half-shrubs or shrubs, scandent or erect. Leaves opposite, simple, subsessile to petiolate, pinnately-nerved, generally small. Inflorescences verticils and densely-flowered, or loose umbel-like cymes, or capitula and few-to densely-flowered; the bracts generally leaf-like. Flowers sessile or pedicellate; bracteoles usually present; calyx tubular, ? actinomorphic or bilabiate, 10-15-veined, pubescent on the inner throat; corolla tubular, white or purple, the tube enclosed or somewhat exserted, bilabiate, sometimes weakly so, the upper lip erect, almost flat, emargi-nate, the lower lip 3-lobed, the middle lobe widest; stamens 2, exserted, the filaments distinct, the connective not developed, the anthers with 2 functional thecae; ovary 4-lobed, gynobase present, ? cylindrical, thei style gynobasic, bifid near the tip, the branches subulate or the anterior somewhat longer and flattened. Nutlets (1-)4, attached at the base, ovoid, the pericarp smooth.
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