What is the difference between Mycorrhizae, Mycorrhiza and Mycorrhizal Fungi. Every time I think I figure out the difference, I read something that confuses my understanding. Sometimes in the context of what I'm reading, it seems like one is a verb (ie. the relationship between the plant/fungi) as opposed to the thing itself, a noun. Is Mycorrhizae plural and Mycorrhiza singular or is it just pronunciation- I say tomAto, you say tomAHto? I'm beginning to think that each term is used improperly a lot as the understanding of it is relatively "new" in the scientific scheme of things. Can someone clarify for me?