Synonyms: Acrostichum lingua (homotypic); Craspedaria chinensis; Cyclophorus bodinieri; Cyclophorus lingua (homotypic); Cyclophorus lingua var. angustifrons; Cyclophorus lingua var. attenuata; Cyclophorus martinii; Cyclophorus taiwanense; Cyclophorus taiwanensis; Niphobolus lingua (homotypic); Niphobolus martinii; Niphobolus sinensis; Polycampium lingua (homotypic); Polypodium lingua (homotypic); Polypodium taiwanense; Pyrrosia caudifrons; Pyrrosia lingua var. lingua; Pyrrosia martinii; Pyrrosia medogensis