Localities documented in Tropicos sources
United States (North America)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
- Williams, M. C. & R. C. Barneby. 1977. The Occurrence of Nitro-toxins in North America Astragalus (Fabaceae). Brittonia 29(3): 310–326. http://www.tropicos.org/Reference/94
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