Brown and Brown. 1992. Woody Plants of Maryland. Port City Press, Inc.
Gleason, H and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. 2nd edition. New York Botanical Garden.
USDA, Forest Service. 1974. Seeds of Woody Plants in the United States. USDA, Ag. Handbook 450.
USDA NRCS National Plant Materials Center. Woody bed and container plant records. Unpublished data.