Echinochloa muricata (P.Beauv.) Fernald  
Family: Poaceae
American barnyard grass, barnyard grass, cockspur grass, rough barnyard grass
Echinochloa muricata image
Josh Sulman  
Echinochloa muricata image
Hugh H. Iltis  
Echinochloa muricata image
Josh Sulman  
Echinochloa muricata image
Josh Sulman  
Echinochloa muricata image
Josh Sulman