This annual is the cultivated "German chamomile"; it may rarely escape, but does not seem to be truly naturalized. There are colls. from HEND (KY), LAUR (KY) and JEFF (DHL). See FNA 19 for notes on the correct name. The similar species known as "Roman chamomile" is the perennual, Chamaemelum nobile (L.) Allioni [= Anthemis nobolis L.]; this is also widely cultivated but not known to have established as a wild plant in Ky. (FNA 19, K, W).