Scorzonera transtagana, Coutinho

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 : 320

12. S. transtagana Coutinho , FI. Port. 690 (1913).

Perennial 20-40 cm, subglabrous to sparsely and minutely tomentose at base of leaves and involucre; rootstock vertical, with a globose to fusiform tuber, not fibrous at apex. Stems usually solitary, simple or with a few branches at base or middle, erect, leafless. Leaves 10-20x 0- 1-0-2 cm, grass-like, entire, folded and keeled, suberect, with densely crowded, rather rigid sheaths. Involucre 20-30 mm. Ligules 14-1| times as long as involucre, yellow, reddish or purplish outside. Achenes 20-30 mm, cylindrical-ellipsoid, attenuate above, with smooth ribs or the outer achenes with squamate ribs, glabrous. Pappus-hairs all plumose, dirty white. Dry places. 9 S. Portugal, S. W. Spain. Hs Lu.