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Decodon verticillatus (Linnaeus) Elliott. Water-oleander, Water-willow, Swamp Loosestrife, Peatweed. Phen: Jul-Sep. Hab: Natural lakes, limesink ponds, peatlands, peaty swamps. Dist: NS, ON, and MN south to c. peninsular FL and e. TX. Reported for McCurtain County, OK by Hoagland, Arbour, & Smith (2022).

ID notes:The lower stems are spongy in texture.

Origin/Endemic status: Native

Synonymy: = Ar, Fl4, FNA10, GW2, K1, K3, K4, Mi, NE, NY, Pa, RAB, S, S13, Tat, Tn, Tx, Va, W, WH3, WV, Graham (1975); > Decodon verticillatus (L.) Elliott var. laevigatus Torr. & Gray – C, F, G, Il; > Decodon verticillatus (L.) Elliott var. verticillatus – C, F, G, Il

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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: 6

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image of plant© Erik Danielson source | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Lowell Urbatsch | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Alan Cressler: Decodon verticillatus, Drummond Swamp, Bartow County, Georgia 2 by Alan Cressler source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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