This weedy alien annual is "occasionally found in fields and waste places at scattered stations" in northeastern states (Cr); 2n = 14 and 28 (FNA 24). It does not appear to be increasing in Ky. There are only two colls., both from FAYE (KY-Agr. Sch.), dated 1890 and 1894, probably from plantings at the Agricultural Experiment Station (Anderson 1924).