出典:Wikipedia
出典:『Wikipedia』 (2011/01/30 01:01 UTC 版)
Athyriaceae is a family of terrestrial ferns, with a cosmopolitan distribution. It has, in the past, included Cystopteris and Gymnocarpium, but those two genera are now recognized as representing a two-member clade that is a basal offshoot of the clade that includes this family, plus Woodsia, the Onocleaceae, Blechnaceae, Aspleniaceae, and Thelypteridaceae. Inversely, this family has by some been subsumed in the family Woodsiaceae, but a Woodsiaceae defined in this way may be paraphyletic if it omits the Onocleaceae and Blechnaceae (as of 2006, the evidence was not clear).