Monographs Details: Baptisia australis var. minor (Lehm.) Fernald
Authority: Isely, Duane. 1981. Leguminosae of the United States. III. Subfamily Papilionoideae: tribes Sophoreae, Podalyrieae, Loteae. Mem. New York Bot. Gard. 25 (3): 1-264.
Description:Distribution and Ecology - Range as given in key. Short-grass plains, prairie relicts, pastures, abandoned fields; calcareous-clay, rocky or cherty slopes, limestone bluffs, glades in woodlands; roadsides, railroads; usually in alkaline, but occasionally sandy soils, often locally abundant and conspicuous. April-May (-June).
Discussion:B. versicolor Lodd. (1826).
B. minor Lehm. (1827); B. australis var [beta] T. & G. (1840); B. australis var minor (Lehm.) Fern. (1937).
B. texana Buckl. (1861).
B. vespertina Small ex Rydb. (1932).
Sterile plants or herbarium specimens with indeterminate flower color are sometimes confused with Baptisia lactea, which, however, has deciduous stipules and longer-petioled upper leaves.
Baptisia australis var minor is attractive and conspicuous. Locally abundant, its persistence may be due to the fact that it is little grazed. It ostensibly hybridizes with B. bracteata var glabrescens.