under construction: last update 6/4/22
Flora of North America Editorial Committee, editor. Flora of North America: North of Mexico. Oxford University Press, 1993. Library of Congress ISBN, http://floranorthamerica.org/Main_Page.
Gottesfeld, Leslie M. J. and Beverley Anderson. “Gitksan Traditional Medicine: Herbs And Healing.” Journal of Ethnobiology 8(1) :13-33.
Murphy, Tim R. and Daniel Lamar Colvin. Weeds of Southern Turfgrasses: golf courses, lawns, roadsides, recreational areas, commercial sod. Gainesville: Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, 1992. Electronic reproduction. [Florida] : Florida State Board of Education, Division of Colleges and Universities, PALMM Project, 2001.
Randolph, Peter. From Slave Cabin to the Pulpit; the Autobiography of Rev. Peter Randolph: The Southern Question Illustrated and Sketches of Slave Life. Boston: James H. Earle Publisher, 1893.