Polymnia canadensis (White-flowered Leafcup)

https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&lsid=urn:lsid:ncbg.unc.edu:taxon:{4E8B53EE-1CE0-4F84-B7DD-E25D8E20AA7E}

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ASTERACEAE

Asteraceae

Polymnia

Polymnia canadensis Linnaeus. Common name: White-flowered Leafcup. Phenology: Jul-Oct. Habitat: Moist forests, particularly over calcareous rocks. Distribution: 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, 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. Basionym: Polymnia canadensis L. 1753

Links to other floras: = Polymnia canadensis - FNA21

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Wetland Indicator Status:

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

Heliophily ⓘ: 3

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Horticultural Information

Intro: Erect perennial found in moist forests, particularly those over calcareous rocks.

Stems: Stems simple or branched, densely hairy and with stalked glands, especially above.

Leaves: Leaves opposite, petiolate (sometimes winged and with large stipules), 10-16 in. long, deeply pinnately divided into 3-7 sharply pointed, coarsely toothed lobes (upper leaves may lack lobes).

Inforescence:

Flowers: Composite flowers (heads) in branched terminal and upper axillary clusters; heads 1/2 in. wide and consisting of 5-8 white, oval ray florets with 3-toothed tips encircling a center disk of tiny, whitish-yellow, tubular florets with protruding yellow stamens.

Fruits:

Comments:

Height: 2-6 ft.

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description: Erect perennial found in moist forests, particularly those over calcareous rocks.

stems: Stems simple or branched, densely hairy and with stalked glands, especially above.

leaves: Leaves opposite, petiolate (sometimes winged and with large stipules), 10-16 in. long, deeply pinnately divided into 3-7 sharply pointed, coarsely toothed lobes (upper leaves may lack lobes).

inflorescence:

flowers: Composite flowers (heads) in branched terminal and upper axillary clusters; heads 1/2 in. wide and consisting of 5-8 white, oval ray florets with 3-toothed tips encircling a center disk of tiny, whitish-yellow, tubular florets with protruding yellow stamens.

fruits:

comments:

cultural notes:

germination code:

native range:

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Flora of the Southeastern United States

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Horticultural Information