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Dulichium arundinaceum (Linnaeus) Britton var. arundinaceum. Common name: Threeway Sedge. Phenology: Jul-Oct. Habitat: Streambanks, marshes, bogs, ditches. Distribution: Var. arundinaceum ranges from NL (Newfoundland) west to MN, south to FL and TX; also from MT and BC south to CA.

ID notes: Recognizable (even when sterile) by the strongly 3-ranked leaves and culms round in cross-section and hollow.

Origin/Endemic status: Native

Taxonomy Comments: A second variety, var. boreale Lepage, is endemic in QC.

Synonymy ⓘ: = Ar, Can, FNA23, K4, NE, NSProv, NY, Pa, POWO, Va; < Dulichium arundinaceum (L.) Britton — C, ETx1, F, G, GrPl, GW1, Il, Mi, Mo1, RAB, S, S13, Tat, Tn, Tx, W, WH3, WV; Cyperus arundinaceus Linnaeus. Basionym: Cyperus arundinaceus L. 1753

Links to other floras: = Dulichium arundinaceum var. arundinaceum - FNA23

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Wetland Indicator Status:

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

Heliophily ⓘ: 8

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward; naturally variegated form | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷

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Horticultural Information

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