Pycnanthemum pilosum Nuttall. Hairy Mountain-mint. Phen: Jul-Sep. Hab: Upland woodlands. Dist: S. ON west to MI and IA, south to TN, AR, and OK. In c. TN, and reported from a single county in e. TN (Chester, Wofford, & Kral 1997), in se. PA (Rhoads & Klein 1993), and WV (Kartesz 1999).

ID notes: P. pilosum differs from P. verticillatum in having the stems thickly (vs. thinly pubescent), the lower surface of the leaves evenly pubescent (vs. pubescence chiefly restricted to the midrib).

Origin/Endemic status: Native

Synonymy: = Ar, F, G, GrPl, K4, Mi, Tn; = Koellia pilosa (Nutt.) Britton – S; = Pycnanthemum verticillatum (Michx.) Pers. var. pilosum (Nutt.) Cooperr. – C, K1, K3, NE, NY, Pa; < Pycnanthemum verticillatum (Michx.) Pers. – Il

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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