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Cyperus diandrus Torrey. Umbrella Flatsedge. Phen: Jul-Oct. Hab: Interdune swales, ponds, exposed river and lake shores, usually where seasonally ponded. Dist: ME west to ND, south to VA, c. TN, n. AL, IL, MO, and IA.

Origin/Endemic status: Native

Synonymy: = C, F, FNA23, G, GrPl, GW1, Il, K1, K3, K4, Mi, Mo1, NY, Pa, S, Tat, Tn, Va, W

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW
  • Eastern Mountains and Piedmont: FACW
  • Great Plains: FACW
  • Midwest: FACW
  • Northcentral & Northeast: OBL

Heliophily: 9

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image of plant© Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Shaun Pogacnik, some rights reserved (CC BY-NC), uploaded by Shaun Pogacnik source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Shaun Pogacnik, some rights reserved (CC BY-NC), uploaded by Shaun Pogacnik source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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