Prunella L.
Perennial herbs with short rhizomes. Lvs simple, entire to pinnatisect. Verticels mostly few-flowered, forming a dense, terminal, oblong spike. Bracts large but not resembling lvs. Calyx tubular-campanulate, not gibbous at base, strongly 2-lipped, 10-nerved or venation reticulate without prominent main veins, closed at fruiting; upper lip with 3 short teeth; lower lip with 2 long teeth. Corolla 2-lipped; tube > calyx, straight, obconic, with ring of hairs inside; upper lip hooded, entire; lower lip 3-lobed, with middle lobe denticulate. Stamens slightly exserted. Filaments with short, subulate appendage below apex; anther cells diverging. Style gynobasic, its branches equal. Nutlets ovoid to elliptic or oblong, longitudinally ribbed.
Key
7 spp., N. temperate. Naturalised spp. 2.
