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Floristic Inventory of the Florida Keys Database Online

Cyperus cuspidatus Kunth
Coastalplain flatsedge

Cyperus cuspidatus
Copyright by: Jay Horn (2021) via iNaturalist

Family: Cyperaceae

Group: Monocot

Substrate: Terrestrial

Habit: Herb

Perennation: Annual

Native Range: Scattered in the southeastern United States, the West Indies, Mexico, Central America and South America; also in the Old World.

Florida Natural Areas Inventory State Status: Not listed

IRC SOUTH FLORIDA Status: Critically Imperiled

Map of select IRC data for peninsular Florida

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

South Florida History and Distribution: This was reported as possibly extirpated in South Florida in Gann et al. (2002; pp 137-139), based on herbarium specimens collected from 1843 to 1980 in Charlotte, Collier, and Lee counties and the Monroe County Keys. The locality of the 1980 collection was undergoing development in 2000. Jay Horn observed this in 2021 at Carnestown, Collier County and reported it on iNaturalist. This station is about 15 miles from where Olga Lakela made a collection at Collier-Seminole State Park in 1965 (Lakela 29208 USF).

SOUTH FLORIDA Cultivated Status: Not Cultivated

FLORIDA KEYS Occurrence: Presumed Extirpated

FLORIDA KEYS Native Status: Presumed Extirpated

IRC FLORIDA KEYS Status: Presumed Extirpated

Map of select IRC data for the Florida Keys

Florida Keys History and Distribution: Only one collection is known - from the herbarium of Alvan W. Chapman. The specimen (s.n., NY) is labeled as collected in 1843 from the island of Key West, but it is not certain if Chapman was the actual collector. Not reported for the Florida Keys by John Kunkel Small in 1913. For more information, see IRC's species account.

Other data on Cyperus cuspidatus available from :

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Cyperus cuspidatus
Copyright by: Jay Horn (2021) via iNaturalist