|Photo by W. A. McAvoy, 2015. The Flora of Delaware Online Database|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Liliopsida – Monocotyledons|
|Natural range of Cyperus hystricinus from USDA NRCS Plants Database.|
Common name: bristly flatsedge
Synonyms: Cyperus retrofractus (Linnaeus) Torrey var. hystricinus (Fernald) Kükenthal
A description of Cyperus hystricinus is provided in The Flora of North America. Cyperus hystricinus is a perennial graminoid.
C. hystricinus is found in sandhill communities and turkey oak-post oak-hickory-longleaf pine communities.  It also has been found in disturbed areas, including recreation areas and near garbage dumps.  The species tends to prefer dry, sandy soils and open, sunny conditions. 
Associated species include Cyperus plukenetii. 
This species has been observed flowering and fruiting in June and August. 
Conservation, cultivation, and restoration
References and notes
- Weakley, A.S. 2020. Flora of the Southeastern United States. Edition of 20 October 2020. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
- Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Loran C. Anderson, Richard Carter, and R. A. Norris. States and Counties: Florida: Okaloosa and Walton. Georgia: Coffee.