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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.
Cal irregularly 10-nerved, bilabiate, the upper lip broad, shallowly 3-toothed, the lower deeply cleft into 2 narrow segments; cor bilabiate, the upper lip galeate-hooded and entire or nearly so, the lower shorter and 3-lobed; cor-tube with a ring of hairs inside; stamens 4, ascending under the galea, the lower pair the longer, scarcely exserted; filaments ± bidentate at the tip, the anther borne on the lower tooth; pollen-sacs set end to end on the expanded connective, separately dehiscent; nutlets smooth; perennial herbs with blue or purple to white fls crowded into a dense, evidently bracteate terminal spike, the bracts sharply differentiated from the lvs. 4, cosmop. (Brunella)
