Pycnanthemum incanum (Linnaeus) Michaux var. incanum . Phen: Late Jun-Aug; Sep-Oct. Hab: Forests and woodland borders. Dist: VT west to s. OH and s. IL, south to nc. NC, w. NC, and nc. TN.
Origin/Endemic status: Native
Other Comments: A tetraploid species (n = 38).
Synonymy: = F, K1, K3, K4, NE, NY, Va; = Pycnanthemum incanum (L.) Michx. – WV, Grant & Epling (1943); = Pycnanthemum incanum (L.) Michx. ssp. incanum; > Koellia dubia (Gray) Small – S; > Koellia incana (L.) Kuntze – S; < Pycnanthemum incanum (L.) Michx. – C, G, Il, Mi, Pa, RAB, Tn, W, Chambers & Hamer (1992)
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