Leonurus L.
Biennial or perennial herbs, sometimes rhizomatous. Lvs digitately lobed or undivided. Infl. spike-like, of many-flowered dense verticels, in crowded or distant axillary whorls. Bracts leaflike. Calyx campanulate, not gibbous at base, 5- or 10-nerved; teeth 5, spinose, subequal. Corolla 2-lipped; tube < calyx; throat not dilated; upper lip hooded, hairy on back; lower lip 3-lobed. Anthers parallel or divergent; cells opening by a common slit. Style gynobasic, its branches equal. Nutlets trigonous; apex truncate.
14 spp., temperate Eurasia. Naturalised sp. 1.
