Digitalis thapsi, 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 : 240

3. D. thapsi L. , Sp. Pl. ed. 2, 867 (1763).

Like 2(a) but whole plant covered with a yellowish indumentum of glandular hairs; inflorescence lax, usually branched at the base; pedicels about twice as long as calyx. Calyx-lobes ovate-lanceolate, acute. Corolla 25-50 mm, pubescent outside. 2« = 56. Rocky slopes and uncultivated fields; calcifuge. • E. Portugal, C. & W. Spain. Hs Lu.