Bartsia L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 269

31. Bartsia L. 1

Perennial, hemiparasitic herbs with a short, rhizomatous, subterranean stock. Leaves opposite, sessile, toothed. Flowers in terminal, bracteate, spike-like racemes, which are not secund. Calyx tubular-campanulate, 4-toothed. Corolla with a cylindrical tube and 2-lipped limb; upper lip entire or emarginate, longer than the lower; lower lip 3-lobed. Stamens 4, didynamous; anthers hairy, equally mucronate at the base. Stigma capitate. Capsule loculicidal; seeds c. 2 mm, rather few, with 1 or more longitudinal, membranous wings; hilum lateral.

1 All bracts ovate, crenate-serrate, exceeding the calyx 1. alpina 1 At least the middle and upper bracts linear-lanceolate, entire,

not exceeding the calyx

2 Lowest bracts ovate, serrate 2. spicata

2 Lowest bracts linear-lanceolate, entire 3. aspera