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Pycnanthemum verticillatum (Michaux) Persoon. Whorled Mountain-mint. Phen: Jul-Sep. Hab: Upland rocky woodlands. Dist: VT west to MI, south to NC and KY.

Origin/Endemic status: Native

Taxonomy Comments: A tetraploid species (n = 38-39).

Synonymy ⓘ: = Ar, F, G, K4, Mi, Tat, Tn, Chambers & Hamer (1992), Grant & Epling (1943); = Koellia verticillata (Michx.) Kuntze – S; = Pycnanthemum verticillatum (Michx.) Pers. var. verticillatum – C, K1, K3, NE, NY, Pa, Va; < Pycnanthemum verticillatum (Michx.) Pers. – Il, RAB, W

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
  • Great Plains: FACW (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 7

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Emily Oglesby | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷

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Horticultural Information

NCBG trait

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Height: 1-3 ft.

plant sale text: Whorled mountain-mint is a vigorous clumping perennial whose highly aromatic leaves look like they have been lightly frosted on top. In mid-late summer, the stems get topped by white flowers speckled with pink and purple that attract a wide variety of bees, butterflies and wasps. This plant can spread by rhizomes so either give it ample space in a meadow or plan to prune the roots by shovel each year to limit its space in a more formal garden.

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native range: eastern North America