Verbatim text: Matthews, J. F. and P. A. Levins. 1985. The genus Portulaca in the southeastern United States. Castanea 50: 96–104.
Author: Matthews, J.F., Levins, P.A.
Year: 1985
Title: The genus Portulaca in the southeastern United States
Journal: Castanea
Volume: 50
Pages: 96–104