Tripleurospermum
mayweed
1 species
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Tripleurospermum inodorumfalse chamomile, false mayweed, scentless mayweed
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout northern 2/3 of North America.
Habitat: Noxious weed in fields and waste ground in eastern Washington
Origin: Introduced from Europe
Flowers: June-September