Dracocephalum nutans, 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 : 161

1. D. nutans L. , Sp. Pl. 596 (1753).

Rhizomatous perennial; stems up to 70 cm, shortly hairy. Basal and lower cauline leaves 15-40 x 10-30 mm, ovate, cordate at base, coarsely crenate, glabrous, the petiole longer than the lamina; upper cauline leaves up to 70 x 40 mm, oblong-ovate, cuneate, the petiole shorter than or equalling the lamina; uppermost cauline leaves subsessile, shortly pubescent. Verticillasters many-flowered, forming an elongate inflorescence. Bracts elliptical, acute, entire. Corolla 17-22 mm, lilac-blue, rarely white. Anthers glabrous. Naturalized in N. & E. Russia. [Rs (N, C, E).] (N. & C. Asia.)