References
For Parkinsonia
Isely, D. 1975. Leguminosae of the United States. II. Subfamily Caesalpinioideae. Memoirs N.Y. Bot. Gard. 25: 1-228. Google Scholar
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young Univ., Provo, UT. Google Scholar
Krings, A., W. Wall, and A. Broadhead. 2023. Parkinsonia. Pp.68-71. In Flora of North America Editorial Committee. 2023a. Flora of North America north of Mexico. Volume 11.1, Magnoliophyta: Fabaceae, part 1. Oxford Univ. Press, New York, NY. 541 pp. Google Scholar
Robertson, K.R., and Y.-T. Lee. 1976. The genera of Caesalpinioideae (Leguminosae) in the southeastern United States. J. Arnold Arb. 57: 1-53. Google Scholar