Verbatim text: Hu, S. Y. 1954–1956. A monograph of the genus Philadelphus. J. Arnold Arbor. 35: 275–333;36: 52–109, 325–368;37: 15–90.
Author: Hu, S.Y.
Year: 1954–1956
Title: A monograph of the genus Philadelphus
Journal: J. Arnold Arbor
Volume: 353637
Pages: 275–33352–109, 325–36815–90