ABSTRACT
Agrostemma githago L., a member of the Caryophyllaceae, is a weed adapted to the cultivation of cereals. Two varieties of Agrostemma have been distinguished, namely, the var. linicolum (Terech.) Hammer with small, smooth seeds which is adapted to flax, and the large-seeded var. macrospermum (Levina) Hammer which grows mainly in wheat fields. 5 Agrostemma is native to Europe and was introduced into the U.S. and Canada. The center of origin of Agrostemma is thought to be the eastern Mediterranean region. 18
