Cyperus grayoides Mohlenbrock. Sand Prairie Flatsedge, Illinois Flatsedge. Phen: May-Nov. Hab: Longleaf pine sandhills, other dry sandy communities. Dist: IL and MO south to w. LA and e. TX.
Origin/Endemic status: Native
Synonymy: = Ar, ETx1, FNA23, Il, Mo1; = Cyperus grayioides Mohlenbr. – C, K3, K4, Mohlenbrock (1959)
Heliophily: 9
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