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CCDB → Pteridophytes → Cystopteridaceae → Cystopteris → Cystopteris fragilis var. mackayii G. Lawson
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cystopteris fragilis var. mackayii G. Lawson | Cystopteris tenuis (Michx.) Desv. | 84 | Cave1956 | Wagner & Hagenah |