Memoirs of The New York Botanical Garden
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of Vascular Plants of Northeastern United States and adjacent Canada
Details: Mimosa pigra L. var. pigra
Isley, Duane. 1973. Leguminosae of the United States: I. Subfamily. Mimosoideae. Mem. New York Bot. Gard. 25 (1): 1-152.
Mimosa pigra L. var. pigra
Tropics of both hemispheres. Not in U.S. I have not studied the specific delimitation of the parent species.