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Polymnia canadensis Linnaeus. White-flowered Leafcup. Phen: Jul-Oct. Hab: Moist forests, particularly over calcareous rocks. Dist: VT and ON west to MN, south to NC, nw. GA, AL, and AR.

Origin/Endemic status: Native

Taxonomy Comments: Previously recognized species or varieties (see synonymy) may have merit and need additional evaluation (Tennessee Flora Committee 2015). The "canadensis entity" has short rays (1-5 mm long; the "radiata entity" has longer, showier rays (6-13 mm long).

Synonymy: = Ar, C, F, FNA21, G, GrPl, Il, K1, K3, K4, Mi, NE, NY, Oh3, Pa, RAB, SE1, Tn, Va, W, WV, Estes & Beck (2011), Pittman, Bates, & Kral (1989), Wells (1965); > Polymnia canadensis L. – S; > Polymnia canadensis L. var. radiata A.Gray; > Polymnia radiata (A.Gray) Small – S

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Wetland Indicator Status:

  • Eastern Mountains and Piedmont: FACU
  • Midwest: FACU
  • Northcentral & Northeast: FACU

Heliophily ?: 3

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image of plant© Alan Cressler: Polymnia canadensis 'radiata', Monteagle Limestone, Jackson County, Alabama 1 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: polymnia canadensis, paint rock river valley, jackson county, alabama 1 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Polymnia canadensis 'radiata', Marshall County, Alabama 1 by Alan Cressler source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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