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Cyperus strigosus Linnaeus var. strigosus . Straw Flatsedge, False Nutsedge. Phen: Jul-Oct. Hab: Marshes, ditches, wet flatwoods, wet disturbed areas. Dist: QC west to SD, south to FL and TX; also in w. North America.

ID notes: This species is often confused with C. esculentus; the two are not closely related (see Key ZE). Small, looser-spiked plants of C. strigosus are easily distinguished at a glance by their longer, more spreading and loosely imbricate scales, greenish in flower and maturing dull stramineous or light brown laterally (vs. yellowish, occasionally light reddish-brown); in flower C. strigosus has shorter anthers (0.3-0.5 mm vs. 1 mm or more).

Origin/Endemic status: Native

Taxonomy Comments: Cyperus strigosus is a widespread and polymorphic taxon; see synonymy and C. strigosus var. stenolepis.

Synonymy: = G, Lowe & Carter (2022c); > Cyperus praelongatus Steud. – S; < Cyperus strigosus L. – Ar, C, ETx1, FNA23, GW1, Il, K1, K3, K4, Mi, Mo1, NcTx, NE, NY, Pa, RAB, Tat, Tn, Tx, Va, W, WH3, WV; > Cyperus strigosus L. – S; > Cyperus strigosus L. var. robustior Britton – F; > Cyperus strigosus L. var. strigosus – F

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FACW (name change)
  • Great Plains: FACW (taxonomic split from wetland indicator species)
  • Midwest: FACW (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

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image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Collectors SOS, spikelets disarticulated from inflorescence | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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