Family 36. Woodsiaceae Herter, Rev. Sudamer. Bot. 9: 14 (1949).

1–3 genera ( Cheilanthopsis, Hymenocystis, Woodsia).

Notes:— Woodsiaceae formerly included Athyriaceae and Diplaziopsidaceae . The family is here defined in its narrowest sense, including only Woodsia and two very closely related genera that, pending further evidence, may have to be merged with Woodsia in the future.

The lineages of Athyriaceae, Cystopteridaceae, Diplaziopsidaceae and Rachidosoraceae are found consistently segregated in all analyses, independently of sampling. Despite the relationships among these groups is not always resolved these lineages cannot be united with other large lineages. They are therefore treated as separate families.