Agrostemma is a genus of annual plants in the family Caryophyllaceae, containing the species known as
corncockles. Its best-known member is
A. githago, the common corncockle, which is a native of Europe. The species is a weed of cereals and other crops, probably with a centre of origin in the eastern Mediterranean. It occurs as a weed worldwide, but is declining in its native range because of improved seed cleaning.
Agrostemma gracile, the slender corncockle, is
(Wikipedia)