Scorzonera austriaca subsp. austriaca

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 : 319

(a) Subsp. austriaca (inch S. ruprechtiana Lipsch. & Krasch. ): Stems simple. Lamina of basal leaves not coriaceous, usually with flat margin, linear to narrowly elliptical, gradually narrowed into a short or long petiole. Throughout the range of the species except Krym.