Astragalus missouriensisAstragalus missouriensis is a species of flowering plant in the legume family known by the common name Missouri milkvetch. It is native to central North America, where it is common and widespread.DescriptionAstragalus missouriensis is a low growing, herbaceous, perennial plant. Though low growing, its stems often reach 15 centimeters in length and as much as 20 centimeters in exceptional circumstances.