Dryopteris filix-mas (L.) Schott subsp. brittonii Fraser-Jenk. & Widén

En: Britton's male fern, Britton's male woodfern
Fr: dryoptère de Britton, dryoptère fougère-mâle
Provincial Status: LN
Range: Boreal cordilleran-Great Lakes disj., Eurasia; disj. in w/nw/neNfld., seLab.; often calc.

[=Dryopteris filix-mas (L.) Schott forma incisa (T.Moore) Hayek]
[=Lastrea filix-mas (L.) C.Presl var. incisa T.Moore]

[A confirmed specimen of D. filix-mas subsp. brittonii (MT00128620) was reported from sLab. (L. Brouillet, pers. comm., Dec. 2016).]

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