Astragalus missouriensis var. amphibolus Barneby
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Floras and Monographs
Astragalus missouriensis var. amphibolus Barneby: [Article] Barneby, Rupert C. 1964. Atlas of North American Astragalus. Mem. New York Bot. Gard. 13(2): 597-1188.
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Narratives