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Cyperus tetragonus Elliott. Common name: Four-angled Flatsedge. Phenology: Jul-Sep. Habitat: Maritime forests and dunes, edges of brackish marshes. Distribution: E. NC south to s. FL and FL Panhandle. Reports of the species in s. AL (Woods, Diamond, & Burkhalter 2016) are based on specimens of C. thyrsiflorus.

ID notes: This species is easy to recognize in the field by its narrowly and very loosely cylindric spikes with relatively short, ellipsoid spikelets.

Origin/Endemic status: Endemic

Taxonomy Comments: C. pringlei of AZ, NM, and n. Mexico has sometimes been treated as conspecific (as by FNA), but it should be regarded as distinct or as a synonym of C. mutisii .

Synonymy ⓘ: = K4, NS, RAB, S; < Cyperus tetragonus Elliott — FNA23, POWO, WH3; Cyperus tetragonus Elliott. Basionym: Cyperus tetragonus Elliott 1821

Links to other floras: < Cyperus tetragonus - FNA23

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC
  • Great Plains: FAC

Heliophily ⓘ: 7

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷

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Horticultural Information

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