| corn chamomile | (n) European white-flowered weed naturalized in North America, Syn. Anthemis arvensis, field chamomile, corn mayweed |
| scentless camomile | (n) ubiquitous European annual weed with white flowers and finely divided leaves naturalized and sometimes cultivated in eastern North America; sometimes included in genus Matricaria, Syn. Matricaria inodorum, scentless hayweed, corn mayweed, scentless false camomile, Tripleurospermum inodorum, scentless mayweed |