Pteridium aquilinum  
Family: Dennstaedtiaceae
bracken, bracken fern, eastern bracken fern
Pteridium aquilinum image
Christopher Noll  
Pteridium aquilinum image
Christopher Noll  
Pteridium aquilinum image
Robert W. Freckmann  
Pteridium aquilinum image
Matthew L. Wagner  
Pteridium aquilinum image
Hugh H. Iltis