Carex hystericina Muhlenberg ex Willdenow. Section: [26qq] Section 30 Vesicariae. Porcupine Sedge. Phen: May-Jul. Hab: Calcareous fens, marshes, and wet meadows, in seepage over serpentine. Dist: NB west to BC, south to w. VA, sc. TN, w. TX, and n. CA.

Origin/Endemic status: Native

Synonymy: = Ar, C, FNA23, G, GrPl, Il, K1, K3, K4, Mi, Mo1, NE, NY, Pa, Tn, Tx, Va; = Carex hystricina – F, W, Mackenzie (1931-1935), orthographic variant

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Wetland Indicator Status:

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

Heliophily: 8