Project 3190: R. A. Ufimov, T. A. Dickinson. 2020. Infrageneric nomenclature adjustments in CrataegusL. (Maleae, Rosaceae). Phytologia. 102 (3):177-199.
Viewing Folio F944 Crataegus intersubgeneric hybrid; nothosect. Phippsara T. A. Dickinson & E. Y. Y. Lo containing 3 media.
