Verbatim text: Dickinson, T. A. et al. 1996. American black-fruited hawthorns. I. Variation in floral construction, breeding system correlates and their possible evolutionary significance in Crataegus sect. Douglasii Loudon. Folia Geobot. Phytotax. 31: 355–371.
Author: Dickinson, T.A.
Year: 1996
Title: American black-fruited hawthorns. I. Variation in floral construction, breeding system correlates and their possible evolutionary significance in Crataegus sect. Douglasii Loudon
Journal: Folia Geobot. Phytotax.
Volume: 31
Pages: 355–371