Lonicera pyrenaica subsp. pyrenaica

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 46

(a) Subsp. pyrenaica :

Leaves less than 3-5 x 1 - 5 cm. Corolla less than 15 mm. Pyrenees and mountains of N.E. Spain.