Inula bifrons, (L.) L.

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 : 136

18. I. bifrons (L.) L. , Sp. Pl. ed. 2,1236 (1763).

Erect, glabrous to glandular-hairy perennial 30-100 cm. Lower leaves 10-30 x 2-6 cm, oblong, entire to coarsely dentate, the upper decurrent. Involucre 9-12 mm, cylindrical; bracts sparsely glandular or hairy, the outer 3-4 x c. 1 mm, linear-lanceolate, erect or with slightly recurved apex, the inner 8-10 x 0-7-1 mm, linear. Ligules 8-10 mm, not exceeding the involucre. Achenes c. 2 mm, hairy; pappus with c. 30 setae. • From S. C. France to Romania and Bulgaria. Al Bu Ga It Ju Rm.

I. thapsoides subsp. urumoffii (Degen) Hayek , Prodr. FI. Penins. Balcan. 2: 605 (1931), from S. Bulgaria, appears to be a variant of 18. It has long patent hairs on the upper part of the stem, the leaves and involucral bracts appressed-hairy, and the upper leaves only shortly decurrent. I. bifrons forma pubescens Velen. , also from S. Bulgaria, is probably identical with this taxon.