Centranthus, Lange. Annuals. At

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 : 56

Sect. Calcitrapa Lange. Annuals. At least the upper leaves lyrate-pinnatifid. Corolla gibbous or shortly spurred. Stigma 3-fid. Fruit glabrous or hairy.