Annual herbs. Leaves serrate, petiolate. Flowers small, in verticillasters in a terminal racemose inflorescence. Bracts narrowly elliptic. Calyx urceolate-campanulate, deeply 2-lipped; upper lip rounded, strongly deflexed in fruit, with a broad deltoid lobe on each side at the base; lower lip ovate, slightly concave. Corolla tubular-campanulate, upper lip 3-lobed, the median lobe deeply 2-fid, thus seemingly 4-lobed; lower lip shorter, entire, boat-shaped. Stamens 4, declinate, shortly exposed, inserted at two different levels of the corolla tube; filaments dilated below, but not appendaged; anther-cells confluent. Disk swollen, glandular. Style briefly 2-fid. Nutlets ovoid, minutely reticulate.
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