My new lexicon entry in the Encyclopedia of Food and Agricultural Ethics on “Fungi Ethics” is online. It can be accessed here. Fungi ethics, which is closely allied to plant ethics, describes how fungi–both for better and worse–are forever imbricated in our food systems. Fungi both destroy and enable crops. Virtually every terrestrial plant is threaded-through with endophytic fungi. A further majority trees and many plants require mycelial mycorrhizae to flourish, and will flag without these crucial extensions and transmitters of their root structure.