pistachio: nut of Mediterranean trees having an edible green kernel
edible nut: a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell
polypodiaceae: ferns: a large family that in some classification systems has been subdivided into several families (including Aspleniaceae and Blechnaceae and Davalliaceae and Dennstaedtiaceae and Dryopteridaceae and Oleandraceae and Pteridaceae)