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Cirsium undulatum (Nuttall) Sprengel. Wavy-leaf Thistle. Phen: May-Jun (-Oct). Hab: Dry prairies, pastures, disturbed areas. Dist: MB west to BC, south to sc. TX, NM, AZ, CA, and Mexico (CHH, COA, DGO, NLE, SON).

Origin/Endemic status: Native

Synonymy: = C, FNA19, GrPl, K3, K4, Mex, Mi, NcTx, Ok, Tx; = n/a – Pa; > Cirsium undulatum (Nutt.) Spreng. var. megacephalum (A.Gray) Fernald – F; > Cirsium undulatum (Nutt.) Spreng. var. undulatum – F

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Wetland Indicator Status:

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

Heliophily: 4

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image of plant© Aidan Campos source | Original Image ⭷
image of plant© Aidan Campos source
image of plant© Paul Marcum source
image of plant© Aidan Campos source
image of plant© Paul Marcum source

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