Adiantum pedatum Linnaeus. clade: pedatum clade. Northern Maidenhair. Phen: Jun-Aug. Hab: Moist forests and cliffs, especially over calcareous or mafic rocks, sometimes in seasonal seepage. Dist: NS and NB west to ON and MN, south to GA, AL, MS, LA, and OK. Sometimes interpreted to also be present in e. Asia; Lu et al. (2011) make clear that Asian material should be treated as two species distinct from Adiantum pedatum; Adiantum japonicum was named in 2021 (Zhao et al. 2021).

Origin/Endemic status: Native

Syn: = Ar, G, GrPl, Il, K4, NE, NY, RAB, S13, Sf, Tat, Tn, Va, W, WV, Lu et al (2011), Paris (1991), Zhao et al (2021a); = Adiantum pedatum L. var. pedatum – F, Mo1; > Adiantum aleuticum (Rupr.) C.A.Paris – FNA2, Pa, misapplied to MD and PA material; > Adiantum aleuticum (Rupr.) C.A.Paris var. aleuticum – K3, misapplied to MD and PA material; < Adiantum pedatum L. – FoC; > Adiantum pedatum L. – FNA2, K3, Pa; > Adiantum pedatum L. ssp. calderi Cody – C, misapplied to MD and PA material; > Adiantum pedatum L. ssp. pedatum – C

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