Anthemis (Cota), (Gay ex Guss.) Rouy. Receptacle

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 : 155

Subgen. Cota (Gay ex Guss.) Rouy. Receptacle hemispherical or subhemispherical; scales all over the receptacle, persistent, more or less rigid, acuminate. Achenes more or less compressed, triangular or triangular-oblong in outline, rhombic in transverse section, usually more or less acute at the lateral angles.