Original identification: Cenchrus longispinus
Current identification: Cenchrus longispinus
Photographer: Gerald D. Carr
Date Photographed: September 3, 2014
Location: U.S.A., Oregon, Multnomah County: Tamahawk Island, sandy waste area off S side of Tomahawk Island Drive, Portland.
Elevation: 31 ft.
Coordinates: 45.60574° N, 122.66729° W