Agrostemma githago
Family: Caryophyllaceae
corn cockle
Agrostemma githago image
Dan Tenaglia  
Agrostemma githago image
Emmet J. Judziewicz  
Etymology: Agrostemma: from Latin for "field chaplet"
Plants: erect, annual, 2'-3' tall forb with thin hairs
Leaves: opposite, untoothed, without stipules, long and narrow
Flowers: pink to reddish, 5-parted, 1"-1 1/2" wide, sepals much longer than the petals and forming a 10-ribbed tube, petal tips with a small notch; solitary, terminal, stalked flowers; blooms July-Sept.
Fruits: capsule
Habitat: dry; disturbed sites
Hazardous: Careful, this plant is hazardous!
Conservation Status: Introduced - adventive
Agrostemma githago image
Emmet J. Judziewicz  
Agrostemma githago image
from USDA Plants website  
Agrostemma githago image
Botanical Illustration  
Agrostemma githago image
Kurt Stüber  
Agrostemma githago image
Botanical Illlustration  
Agrostemma githago image
Botanical Illustration  
Agrostemma githago image
Agrostemma githago image