musca vomitoria

Webster's Dictionary (GCIDE)

1.(Bot.) an annual Eurasian plant (Centaurea cyanus) which grows in grain fields; -- called also bachelor's button. It receives its name from its blue bottle-shaped flowers. Varieties cultivated in North America have showy heads of blue or purple or pink or white flowers

Syn: cornflower, bachelor's button. [1913 Webster + WordNet 1.5]

2.(Zool.) A large and troublesome species of blowfly (Musca vomitoria). Its body is steel blue. [1913 Webster]