Kalmar "Family Blechnaceae" tana nufin dangin taxonomic na ferns waɗanda ke cikin tsari na Polypodiales. Iyalin sun haɗa da nau'ikan ferns iri-iri waɗanda aka rarraba a cikin duniya, musamman a yankuna masu zafi. Wasu misalan fern na yau da kullun a cikin wannan iyali sun haɗa da ƙwanƙolin barewa, ƙwanƙarar ruwa mai tsayi, da sarƙar sarƙoƙi. . Sunan Blechnaceae ya fito ne daga jinsin Blechnum, wanda shine ɗayan mafi girma a cikin dangi. Ferns a cikin wannan iyali suna da siffa ta fronds (ganye), waɗanda yawanci manya ne, fili mai ƙarfi, kuma galibi suna da tsaka-tsaki na musamman. Har ila yau, suna da sori (clusters na spores) a ƙarƙashin fronds na su, wanda sau da yawa ana kiyaye su ta hanyar indusium (tsari mai kama da membrane).