Fr: dryoptère arquée
Provincial Status: LN
Range: Boreal eNA; thr. Nfld., N to cLab.
[=Aspidium campylopterum Kunze, nom. inval., nom. prov.]
[=Aspidium spinulosum (O.F.Müll.) Sw. var. americanum Fisch. ex Kunze]
[=Aspidium spinulosum (O.F.Müll.) Sw. var. concordianum (Davenp.) Eastman]
[=Dryopteris americana (Fisch. ex Kunze) Clute, nom. inval., nom. provis.]
[=Dryopteris austriaca (Jacq.) Woyn. ex Schinz & Thell. var. concordiana (Davenp.) C.V.Morton]
[=Dryopteris dilatata (Hoffm.) A.Gray subsp. americana (Fisch. ex Kunze) Hultén]
[=Dryopteris dilatata (Hoffm.) A.Gray subsp. campyloptera (Clarkson) C.V.Morton]
[=Dryopteris dilatata (Hoffm.) A.Gray var. americana (Fisch. ex Kunze) Benedict]
[=Dryopteris intermedia (Muhl. ex Willd.) A.Gray forma concordiana (Davenp.) Clute]
[=Dryopteris intermedia (Muhl. ex Willd.) A.Gray var. concordiana (Davenp.) M.Broun]
[=Dryopteris spinulosa (O.F.Müll.) Watt. var. americana (Fisch. ex Kunze) Fernald]
[=Dryopteris spinulosa (O.F.Müll.) Watt. var. concordiana (Davenp.) Eastman]
[=Filix spinulosa (O.F.Müll.) Farw. var. americana (Fisch. ex Kunze) Farw.]
[=Filix spinulosa (O.F.Müll.) Farw. var. concordiana (Davenp.) Farw.]
[=Filix-mas rigida Farw. var. americana (Fisch. ex Kunze) Farw.]
[=Filix-mas spinulosa (O.F.Müll.) Farw. var. americana (Fisch. ex Kunze) Farw.]
[=Nephrodium spinulosum (Retz.) Desv. forma concordianum (Davenp.) Clute]
[=Nephrodium spinulosum (Retz.) Desv. var. concordianum Davenp.]
[=Thelypteris dilatata (Hoffm.) House var. americana (Fisch. ex Kunze) House]
[=Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. americana (Fisch. ex Kunze) Weath.]
[=Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. concordiana (Davenp.) Weath.]
[Kunze's earlier name, Aspidium campylopterum (1848), is now treated as an invalid name, which changes the authorities of all names based on A. campylopterum. Dryopteris campyloptera is an allotetraploid derived from the diploid D. expansa and D. intermedia (FNA 2:287). An unnamed hybrid of D. campyloptera × D. cristata is reported from Nfld. from within the overlapping range of the parent species.]