Verbascum glabratum subsp. glabratum

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 : 216

(a) Subsp. glabratum :

Basal leaves broadly ovate-cordate, coarsely and doubly dentate or serrate, incise-dentate towards the base. Cauline leaves ovate-cordate. Fascicles 2- to 7-flowered. Pedicels of primary flowers 6-7 mm. From C. Greece to the Ukrainian Carpathians and C. Jugoslavia.