Eupatorium cannabinum subsp. cannabinum

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 : 109

(a) Subsp. cannabinum :

Plant usually robust and tall; middle cauline leaves almost always 3- to 5-fid; pappus longer than achene. 2« = 20, 40. Throughout the range of the species, except Corse.