Teucrium flavum subsp. flavum

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 : 133

(a) Subsp. flavum :

Plant usually velutinous; larger leaves usually 20-40 cm; calyx 8-10 mm; teeth c. £ as long as tube. From S.E. France to the W. part of the Balkan peninsula.