Verbatim text: Essig, F. B. 1990. The Clematis virginiana (Ranunculaceae) complex in the southeastern United States. Sida 14: 49-68.
Author: Essig, F.B.
Year: 1990
Title: The Clematis virginiana (Ranunculaceae) complex in the southeastern United States
Journal: Sida
Volume: 14
Pages: 49–68