Asyneuma canescens subsp. canescens

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 : 95

(a) Subsp. canescens :

Cauline leaves elliptic-obovate, more or less petiolate, crowded in the lower part of the stem, becoming abruptly smaller in the upper part. 2л = 32, 32 + В. Throughout the range of the species.