4. Cota J. Gay ex Guss.

About 40 species, Europe, Asia, Africa.

Recent molecular studies by Oberprieler (2001) have shown that most of the taxa traditionally treated as Anthemis subgenus Cota (J. Gay ex Guss.) Rouy are more distantly related to the remainder of the Anthemis lineage than are species of Tripleurospermum. Although the single species of Cota in Missouri is easily distinguished from Anthemis species, overall the genus Cota differs from Anthemis in details of fruit shape, ribbing, and wall anatomy, as well as phytochemical and cytogenetic data, which are not popular characters among writers and users of floristic manuals. Nevertheless, its inclusion in a broadly circumscribed Anthemis would result in an unnatural assemblage if the morphologically discordant Tripleurospermum continued to be recognized as a separate genus.