Autotriploid 20-stamen black-fruited hawthorn of northwestern North America (apparently restricted to Marin and Sonoma counties in California)
Folio Media
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 F1093 Crataegus gaylussacia A.Heller containing 8 media.