diploid hybrid = ♀ diploid C. suksdorfii × ♂C. monogyna nothosect. Crataeglasia K.I. Chr. & T.A. Dickinson (Crataegus sect. Crataegus × sect. Douglasianae) nothoser. Crataeglasianae K.I. Chr. & T.A. Dickinson (Crataegus ser. Crataegus × ser. Douglasianae)
Project 832: T. A. Dickinson, S. Han. 2023. What is Suksdorf’s hawthorn? revision of the western North American 20-stamen black-fruited hawthorns (Crataegus series Douglasianae, Rosaceae subtribe Malinae). Journal of the Botanical Research Institute of Texas. 17 (1):151-189.
Viewing Folio F1097 Crataegus ×cogswellii K.I.Chr. & T.A.Dickinson containing 7 media.