Scorzonera fistulosa, Brot.

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

19. S. fistulosa Brot. , Fl. Lusit. 1: 329 (1804).

Perennial 15-70 cm, glabrous except sometimes for base of involucre; rootstock long-creeping, branched, slender. Stems procumbent at base, ascending to erect above, simple or branched in lower half, fistular, leafy. Lower leaves 10-30 x 0-2-0-5 cm, fistular, more or less sulcate, subulate at apex, flattened and widened at base. Involucre 10-20 mm. Ligules 1 -J--2 times as long as involucre, yellow, purplish outside. Achenes c. 6 mm, narrowly elliptical, with smooth ribs. Pappus-hairs slightly longer than achene, dirty white. Water-meadows and other seasonally wet places. • C. & S. Portugal, S. W. Spain', very local. Hs Lu.