This poorly known series contains C. lassa and other spp.
Folio Media
Project 3190: R. A. Ufimov, T. A. Dickinson. 2020. Infrageneric nomenclature adjustments in CrataegusL. (Maleae, Rosaceae). Phytologia. 102 (3):177-199.
Viewing Folio F931 Crataegus L. subg. Americanae El Gazzar sect. Coccineae Loudon ser. Lacrimatae J.B Phipps containing 1 media.