MAYWEED
mayweed, dog fennel, stinking mayweed, stinking chamomile, Anthemis cotula
(noun) widespread rank-smelling weed having white-rayed flower heads with yellow discs
Source: WordNet® 3.1
Etymology
Noun
mayweed (plural mayweeds)
stinking chamomile, Anthemis cotula.
corn chamomile, field chamomile, Anthemis arvensis.
Plants of the genera Matricaria and Tripleurospermum.
A mayflower.
Source: Wiktionary
May"weed`, n. (Bot.)
(a) A composite plant (Anthemis Cotula), having a strong odor; dog's
fennel. It is a native of Europe, now common by the roadsides in the
United States.
(b) The feverfew.
Source: Webster’s Unabridged Dictionary 1913 Edition