Cladium mariscoides (Muhlenberg) Torrey. Common name: Twig-rush, Fen-sedge, Smooth Sawgrass. Phenology: Jul-Sep. Habitat: In strongly acidic to circumneutral situations, including acidic seepage at the margins of brackish marshes, in wet flats under Pinus serotina and Taxodium ascendens (Gaddy & Rayner 1980), in mucky seepage bogs in the fall-line sandhills, in peaty fens and bogs in the Mountains (especially over mafic or ultramafic rocks, such as amphibolite), in oligohaline tidal marshes and interdune ponds. Distribution: NL (Newfoundland) west to SK Widespread and rather common north of the glacial boundary, with scattered and disjunct occurrences southward in VA, NC, SC, GA, Panhandle FL, n. KY (Clark et al. 2005), s. AL, se. MS (Sorrie & Leonard 1999), and e. TX. Bridges, Orzell, & Burkhalter (1993) discussed in detail the phytogeography of this plant, particularly in reference to its southern occurrences, which are curiously fragmented and disjunct.

Origin/Endemic status: Native

Synonymy ⓘ: = C, Can, ETx1, F, FNA23, G, Il, K4, Mi, NcTx, NE, NS, NY, Pa, POWO, RAB, S13, Tat, Va, W, WH3; = Mariscus mariscoides (Muhl.) Kuntze — S; Schoenus mariscoides Muhlenberg. Basionym: Schoenus mariscoides Muhl. 1817

Links to other floras: = Cladium mariscoides - FNA23

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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 ⓘ: 9