Annual aromatic herbs with a sparse pilose indumentum. Leaves undivided, serrate, prominently gland-dotted, petiolate. Verticillasters 2-flowered, in elongated terminal or lateral racemes. Bracts very small. Flowers white or purplish. Calyx very small in flower, much enlarging in fruit and ± gibbous, bilabiate; throat with a villous ring of hairs; teeth unequal. Corolla little longer than calyx, bilabiate. Stamens 2 (posterior); anterior pair reduced to staminodes; thecae 2-locular, divergent. Style rather deeply bifid. Nutlets globose with a prominent raised reticulum.