Cyperus acuminatus
This plant is native to North America , where it is widespread across the Great Plains and the western United States , with scattered populations in the eastern US as well as in Saskatchewan , Tamaulipas and Coahuila . 
<triplet> North America <subj> United States <obj> has part <subj> US <obj> has part <triplet> Great Plains <subj> North America <obj> continent <subj> United States <obj> country <triplet> United States <subj> North America <obj> part of <triplet> US <subj> North America <obj> part of <triplet> Saskatchewan <subj> North America <obj> continent <triplet> Coahuila <subj> North America <obj> continent