Cyperus esculentus var. leptostachyus   yellow nut-grass
           
  
Cyperaceae
non-native                      grasslike           
Distribution: Greenbelt

UW Burke Herbarium Link: Cyperus esculentus var. leptostachyus
USDA Plants Link: Cyperus esculentus var. leptostachyus   (CYESL)
Flora of North America Link: Cyperus esculentus var. leptostachyus