Scorzonera tuberosa, Pallas

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 : 322

28. S. tuberosa Pallas , Reise 3: 757 (1776).

Perennial 3-10 cm with the habit of a Gagea , sparsely tomentose with short, crispate hairs throughout; rootstock vertical, with a globose tuber 2-5 cm below surface of soil, not fibrous at apex. Stems solitary or few, slender, branched at or above the middle, ascending or erect, leafy at least in lower half. Leaves 3-15 x0-1-0-4 cm, linear. Involucre 8-12 mm. Ligules c. li times as long as bracts, yellow, reddish outside. Achenes c. 4 mm. Pappus-hairs c. 2| times as long as achene, plumose, pale reddish-brown. Sandy steppes. S.E. Russia and W. Kazakhstan. Rs (E).

A single record for N.W. Spain is probably a misidentification.