First published in Ill. Key Amer. Trifolium: 67 (1910)
- Isely, D. (1998). Native and Naturalized Leguminosae (Fabaceae) of the United States: 1-1007. Monte L. Bean Life Science Museum. Brigham Young University, Provo, Utah.
Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
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