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R. W. Smith

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An Eurasian weed, now cosmopolitan. Although the species was listed by the First Survey, the earliest collection extant seems to be from 1843 (presumably Macomb or Oakland Co.). Roadsides, parking lots, dumps, farmyards, fields, lawns and gardens, and other disturbed sites.

Anthemis arvensis, Matricaria chamomilla, and Tripleurospermum inodorum are all often mistaken for this species, and the keys should be carefully checked.

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