This series contains C. crus-galli (A10), C. tenax (A20), and C. ×disperma (A20?: sensu Phipps (2015) in FNA).
Project 3190: R. A. Ufimov, T. A. Dickinson. 2020. Infrageneric nomenclature adjustments in CrataegusL. (Maleae, Rosaceae). Phytologia. 102 (3):177-199.
Viewing Folio F880 Crataegus L. subg. Americanae El Gazzar sect. Coccineae Loudon ser. Crus-galli (Loudon) Rehder containing 30 media.