R. D. Meikle, Flora of Cyprus 1. 1977T. G. Tutin, V. H. Heywood, N. A. Burges, D. M. Moore, D. H. Valentine, S. M. Walters & D. A. Webb, Flora Europaea 2. 1968
but modified
1Stems canescent with adpressed or somewhat spreading hairs; fruit rather small and dry, usually not longer than 4 mm
1'Stems sparsely hairy at first, glabrescent; fruit very large, longer than 4 mm