Rhagadiolus Scop.

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 : 308

155. Rhagadiolus Scop. 1

Annuals. Stems usually solitary, branched. Leaves dentate to pinnatifid. Capitula few to numerous. Involucral bracts in 2 rows, the outer very short, the inner accrescent and patent in fruit. Receptacle flat, without scales. Ligules yellow. Achenes narrowly cylindrical, the inner caducous, the outer enclosed in the involucral bracts and long-persistent; pappus absent.