Scorzonera ensifolia, Bieb.

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 : 321

22. S. ensifolia Bieb. , FI. Taur.-Cauc. 2: 235 (1808).

Perennial 20-60 cm, densely villous at base of stems and on involucre, sometimes also on leaves and rest of stems; rootstock vertical, cylindrical, not fibrous at apex. Stems solitary or few, simple or sparingly branched, erect, leafy usually throughout. Leaves 5-25 x 0-2-0-6(-l) cm, linear-lanceolate, long-attenuate at apex, rigid, with prominent veins. Involucre 18-22 mm. Ligules c. 1| times as long as involucre, yellow. Achenes 5-7 mm, cylindrical. Pappus-hairs 2-2| times as long as achene, plumose below, pale reddish-brown. Sandy places. S. part of U.S.S.R. Rs (C, W, E).

S. biebersteinii Lipsch. , Fragm. Monogr. Scorzonerae 2: 95 (1939) ( S. eriosperma Bieb. , non Gouan), from the Caucasus, with subglabrous involucre and acute (not acuminate) bracts has been doubtfully reported from S.W. Ukraine.