For Rhynchosia
Grear, J.W. 1978. A revision of the New World species of Rhynchosia (Leguminosae-Faboideae). Mem. New York Bot. Gard. 31: 1-168. 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
Woods, M. 2023b. Rhynchosia. Pp. 382-389. 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
Woods, M., and J. Key. 2009. The genus Rhynchosia (Fabaceae) in Alabama. Phytologia 91: 3-17. Google Scholar