Pycnanthemum pycnanthemoides (Leavenworth) Fernald var. viridifolium Fernald. Phen: Jul-Aug. Hab: Forests and woodland borders. Dist: VA and WV south to ec. GA, AL, and Panhandle FL.
Origin/Endemic status: Endemic
Taxonomy Comments: A tetraploid species (n = 36). The recognition of this variety is doubtful.
Synonymy: = F, G, K1, K3, K4; = Pycnanthemum viridifolium (Fernald) E.Grant & Epling – Grant & Epling (1943); > Koellia dubia (Gray) Small – S; > Koellia pycnanthemoides (Leavenw.) Kuntze – S; < Pycnanthemum incanum (L.) Michx. – RAB; < Pycnanthemum pycnanthemoides (Leavenw.) Fernald – C, Tn, WH3, Chambers & Hamer (1992)
Heliophily: 7
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