Inula salicina subsp. salicina, L., L.

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 : 134

(a) Subsp. salicina :

Stem setose at base, otherwise glabrous; leaves entire or remotely denticulate, glabrous or subglabrous. In = 16. Throughout the range of the species except parts of the south-east.