Lycopus L.
Perennial, odourless herbs with creeping rhizomes. Lvs simple, coarsely toothed to pinnatisect. Verticels many-flowered, in dense, discrete, globose whorls. Bracts usually similar to lvs. Calyx campanulate, 13-nerved, not gibbous at base; teeth 5, equal. Corolla tube mostly < calyx; lobes 4, subequal, the uppermost usually widest. Stamens 2, exserted, divergent; staminodes 0 or 2. Style gynobasic, its branches equal. Nutlets angular, with broad margin, mostly smooth; apex truncate.
14 spp., N. temperate regions. Naturalised sp. 1.
