Synonyms: Aspidium viridulum; Asplenium diaphanum (homotypic); Athyrium fumarioides; Cystopteris abyssinica; Cystopteris acuta; Cystopteris almaatensis; Cystopteris altajensis; Cystopteris atrovirens; Cystopteris atrovirescens; Cystopteris azorica; Cystopteris canariensis; Cystopteris emarginato-denticulata; Cystopteris emarginulata; Cystopteris filix-fragilis canariensis; Cystopteris filix-fragilis diaphana; Cystopteris fragilis canariensis; Cystopteris fragilis diaphana; Cystopteris fragilis emarginato-denticulata; Cystopteris fragilis var. altaiensis; Cystopteris fragilis var. azorica; Cystopteris fragilis var. canariensis; Cystopteris fragilis var. diaphana (homotypic); Cystopteris fragilis var. nigrescens; Cystopteris fragilis var. platychlaena; Cystopteris fragilis var. sempervirens; Cystopteris fragilis var. translucens; Cystopteris fumarioides; Cystopteris guizhouensis; Cystopteris gureevae; Cystopteris nivalis; Cystopteris sempervirens; Cystopteris translucens; Cystopteris viridula; Polypodium diaphanum (homotypic); Woodsia nivalis