Sideritis hyssopifolia subsp. hyssopifolia

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 : 141

(a) Subsp. hyssopifolia :

Leaves mostly 4-10 mm wide, oblonglanceolate or elliptical; lower bracts 9-12 x 9-16 mm, equalling or exceeding calyx, ovate to ovate-cordate, incise-dentate. Throughout the range of the species except Portugal.