Pycnanthemum torreyi Bentham. Common name: Torrey's Mountain-mint. Phenology: Jun-Oct. Habitat: Dry rocky woodlands, over mafic, ultramafic, or calcareous rocks, dry powerline rights-of-way. Distribution: NH west to IL, south to NC and SC.

ID notes: See Snyder (1994) for additional notes on the identification of P. torreyi.

Origin/Endemic status: Native

Taxonomy Comments: A tetraploid and hexaploid species (n = 40 and ca. 60). The epithet spelling ‘torrei’ is a correctable error.

Synonymy ⓘ: = C, G, K4, Mo3, NY, Tn, Va, Chambers & Hamer (1992), Grant & Epling (1943); = Koellia leptodon (Gray) Kuntze — S; = n/a — Tat; = Pycnanthemum torrei — Il, NE, Pa, orthographic variant; > Pycnanthemum torrei var. leptodon (Gray) Boomhour — F, orthographic variant; > Pycnanthemum torrei var. torrei — F, orthographic variant; < Pycnanthemum verticillatum (Michx.) Pers. — RAB. Basionym: Pycnanthemum torreyi Benth. 1834

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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 ⓘ: 8