Rhynchospora chalarocephala
Rhynchospora chalarocephala, known by the common name of loosehead beaksedge, is a member of the sedge family, Cyperaceae. It is a perennial herb, found throughout the southeastern and Mid-Atlantic United States, from New Jersey to Texas. References

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chalarocephala
Flora of the Eastern United States
Flora of the Southeastern United States
Plants described in 1940