Buglossoides arvensis subsp. sibthorpiana, (Griseb.) R. Fernandes

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 87-88

(d) Subsp. sibthorpiana (Griseb.) R. Fernandes , loc. cit. (1971)

( Lithospermum sibthorpianum Griseb. , L. leithneri Heldr. & Sart. ):

Like subsp. (c) but pedicels cylindrical; receptacle not or only slightly oblique in fruit; corolla usually white; nutlets 2-5-2-75 x 1-5-1-75 mm, more attenuate than in subsp. (c). S.E. Europe.