Senecio ambiguus subsp. ambiguus

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 : 194

(a) Subsp. ambiguus (incl. S', taygeteus Boiss. & Heldr. ): Stems and involucre densely white-tomentose, sometimes somewhat glabrescent above. Leaves more or less lyrate-pinnatifid with the lobes irregularly dentate to pinnatifid, densely white-tomentose beneath, persistently arachnoid-tomentose or somewhat glabrescent above. Sicilia and Lipari; S. Greece.