Copy permalink to share

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

Links to other floras: = Polymnia canadensis - FNA21

Show in key(s)

Show parent genus

Wetland Indicator Status:

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

Heliophily : 3

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Alan Cressler: Polymnia canadensis 'radiata', Monteagle Limestone, Jackson County, Alabama 1 by Alan Cressler source | Original Image ⭷
image of plant© Scott Ward | 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© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

Feedback

See something wrong or missing on about Polymnia canadensis? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.


Horticultural Information

NCBG trait

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.

plant sale text:

bloom table text:

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: