Older version of Localities documented in Tropicos sources

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Canada (North America)
United States (North America)

Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville. http://www.tropicos.org/Reference/1103
Boivin, B. 1967. Flora of the Prairie Provinces. Phytologia 15(6): 329–446. http://www.tropicos.org/Reference/400
Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren. 1989. Vascular Plants of the Intermountain West, U.S.A., FABALES. 3B: 1–279. In A. J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermount. Fl. Hafner Pub. Co., New York. http://www.tropicos.org/Reference/35722
Barneby, R. C. 1952. A revision of the North American species of Oxytropis DC. Proc. Calif. Acad. Sci. 27: 177–312. http://www.tropicos.org/Reference/19