Ophrys fusca subsp. fusca

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1980, Flora Europaea. Volume 5. Alismataceae to Orchidaceae (Monocotyledones), Cambridge: Cambridge University Press : 346

(b) Subsp. fusca :

Flowers 3-8. Inner perianth-segments subglabrous. Labellum 13-15 x 9-12 mm. Speculum greyish-blue or bluish-violet. 2« =72(76). Throughout most of the range of the species.