Schoenoplectus heterochaetus (Chase) Soják
Family: Cyperaceae
slender bulrush
[Scirpus heterochaetus Chase,  more...]
Schoenoplectus heterochaetus image
from USDA Plants website  
Schoenoplectus heterochaetus image
University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)