Thymus serpyllum subsp. serpyllum

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 : 182

(a) Subsp. serpyllum

( T. serpyllum subsp. angustifolius (Pers.) Arcangeli & subsp. rigidus (Wimmer & Grab.) Lyka ):

Leaves 5-10 x (l-)2-3(-4) mm, more or less equal. Calyx 3-4 mm, the upper teeth mostly O-5-O-8 mm. Corolla 6-7 mm. 2« = 24. Throughout the range of the species.