A very local plant in Indiana. It has been reported from Jefferson and Vigo Counties and from the Lower Wabash Valley. Usually a parasite on the roots of Ambrosia trifida. I found it as a common plant on this host on the east bank of Goose Pond in Gibson County. Miss Edna Banta found it on the roots of tobacco plants in Jefferson County. In 1938 I found it in Knox County.