Verbatim text: Phipps, J. B. 1988b. Crataegus (Maloideae, Rosaceae) of the southeastern United States. I. Introduction and series Aestivales. J. Arnold Arbor. 69: 401–431.
Author: Phipps, J.B.
Year: 1988b
Title: Crataegus (Maloideae, Rosaceae) of the southeastern United States. I. Introduction and series Aestivales
Journal: J. Arnold Arbor
Volume: 69
Pages: 401–431