Croton michauxii var. ellipticus (Willd.) B. W. van Ee & P. E.Berry
Family: Euphorbiaceae
Michaux's croton
Images
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From Flora of Indiana (1940) by Charles C. Deam

In a hard, white, minimacid, clay soil in a post and pin oak flat in Spencer County about 4 miles northwest of Chrisney. It was abundant in a 40-acre fallow field and scattered in an adjoining open woods, but was not found in the thick woods. Whether it was introduced into the fallow field and spread into the adjacent woods, or vice versa, I do not know.