Crepis tectorum subsp. tectorum

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 : 353

(a) Subsp. tectorum ( C. astrachanica Steven ex Czerep ., C. ramosissima D’Urv. ): Stems (7-)12-100 cm. Basal leaves few; cauline numerous. Capitula usually many; involucral bracts 7-10 mm, more or less tomentose and with few to numerous short hairs. Ligules 12-15 mm. Throughout the range of the species.