| Dryopteris Adans. | |
| Publ. & Syn. | Excluded: Dryopteris abbreviata, D. dilatata. |
| Notes | The five species that reach the Arctic belong to three different groups, all nearly circumboreal: (a) the D. dilatata group with D. carthusiana and D. expansa as representatives reaching the Arctic; (b) the D. filix-mas group with D. filix-mas and D. marginalis as such; and (c) D. fragrans. The first-mentioned group is problematic and has been extensively investigated (see references in Montgomery and Wagner Jr. 1993 and Sarvela 2000b). Six species names have been applied to three northern species - D. dilatata (= D. austriaca auct.), D. carthusiana (= D. spinulosa), and D. expansa (= D. assimilis) - only the two last-mentioned species have documented arctic occurrences. Northwestern European authors have often confused the more temperate D. dilatata with D. expansa, whereas Russian authors have confused D. carthusiana and D. expansa. |
| Chromosomes | (1) 78 (2x). - Europe (N), Canada. - Several reports. (2) ca. 80 (2x). - Europe, Far East (S)? - Löve and Löve (1961d); Mitui (1970). |
| Geography | Circumpolar-alpine: NOR RUS SIB RFE ALA CAN GRL. |
| Parent taxon | Dryopteridaceae |
| Child taxa |
Dryopteris carthusiana (Vill.) H.P. Fuchs Dryopteris expansa (C. Presl) FraserJenk. & Jermy Dryopteris filix-mas (L.) Schott Dryopteris fragrans (L.) Schott Dryopteris marginalis (L.) A. Gray |
| PAF ID | 1001 |