douglasiana, Taxa Only, Exact Match: 2 Treatments

Crataegus			Dickinson, Timothy A. & Han, Shery, 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), pp. 151-189 : 174-175	174-175
Crataegus			Dickinson, Timothy A. & Han, Shery, 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), pp. 151-189 : 173	173