Cystopteris fragilis wani nau'in fern ne wanda aka fi sani da brittle bladder fern. Ita ce ƙwanƙwasa kuma ƙarami wadda takan girma a cikin duwatsu, wuraren inuwa kamar ramuka, tudu, da tudu. Furen tsiron suna rarrabuwa sosai kuma suna da siffar triangular. Wannan tsiron yana samar da spores a ƙarƙashin fronds, waɗanda ke kiyaye su ta hanyar sirara, membrane translucent da ake kira indusium. Sunan "fragilis" yana nufin yanayin rashin ƙarfi na shuka, wanda zai iya karyawa ko lalacewa cikin sauƙi.