Schoenoplectus pungens   common threesquare
           (Alt: Scirpus pungens )
Cyperaceae
native                      grasslike           
Distribution: Greenbelt

UW Burke Herbarium Link: Schoenoplectus pungens
USDA Plants Link: Schoenoplectus pungens   (SCPUB)
Flora of North America Link: Schoenoplectus pungens