Halin Cystopteris yana nufin ƙungiyar ferns waɗanda ke cikin dangin Cystopteridaceae. Waɗannan ferns suna da ƙayyadaddun ƙayatattun kusoshi, waɗanda galibi kunkuntar su ne kuma siffa mai kusurwa uku. An fi sanin su da fern mafitsara saboda bayyanar su, wanda ke rufe da wani siriri, mai kama da mafitsara mai suna indusium. kwayoyin halitta zuwa ƙungiyoyin da ke raba halaye iri ɗaya. Sunan "Cystopteris" ya samo asali ne daga kalmomin Helenanci "kystis," ma'anar "bladder," da "pteris," ma'ana "fern." Saboda haka, ana iya fassara nau'in Cystopteris zuwa ma'anar "ferns mafitsara."