Stachys palustris, 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 : 154-155

25. S. palustris L. , Sp. Pl. 580 (1753)

(inch S. maeotica Postr. , 5. wolgensis Wilensky).

Erect, sparsely to densely hairy, usually eglandular perennial 30-120 cm. Leaves 30-120 x 7-35 mm, oblong or oblong-lanceolate, acute, cordate at base, crenate, appressed-pubescent, the lower shortly petiolate, the upper sessile. Verticillasters usually 4- to 10-flowered, the upper crowded, the lower distant. Calyx 6-8 mm, usually eglandular; teeth equal, as long as or slightly shorter than tube. Corolla (11—) 12—15 mm, purple, puberulent; upper lip 3^4 mm; lower lip 5-7 mm. 2n= 64, 102. Damp places, and as a weed in cultivated fields. Most of Europe, but rare in the Mediterranean region. All except Az BI Cr Fa Is Sa Sb Si.

Hybrids between 24 and 25 and hybrid swarms derived from these have been recorded from many parts of Europe.