Verbatim text: Weaver, R. E. 1969. Studies in the North American genus Fothergilla (Hamamelidaceae). J. Arnold Arbor. 50: 599-619.
Author: Weaver, R.E.
Year: 1969
Title: Studies in the North American genus Fothergilla (Hamamelidaceae)
Journal: J. Arnold Arbor
Volume: 50
Pages: 599–619
BHL link: http://www.biodiversitylibrary.org/part/24692