Centaurea cyanus -LRB- Cornflower , Bachelor 's button , LOCATION@1 , Boutonniere flower , LOCATION@2 -RRB- is a small annual flowering plant in the family Asteraceae , native to LOCATION@3 .

The Cornflower -LRB- Centaurea cyanus -RRB- also called Bachelor 's button , Basket flower , and Boutonniere flower is a small flowering plant in the family Asteraceae .
