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CCDB → Pteridophytes → Athyriaceae → Athyrium → Athyrium filix-femina subsp. angustum (Willd.) R. T. Clausen
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Athyrium filix-femina subsp. angustum (Willd.) R. T. Clausen | Athyrium filix-femina var. angustum (Willd.) G. Lawson | 80 | IPCN online | Love, A. & D. Love. 1976. In IOPB chromosome number reports LIII. Taxon 25: 483–500. | ||
| ! | Athyrium filix-femina subsp. angustum (Willd.) R. T. Clausen | Athyrium filix-femina var. angustum (Willd.) G. Lawson | 80 | IPCN66 | Love & Love 1966b |