funga is the name of the kingdom, a recent change to align with the now-accepted designations flora and fauna (and of course bacteria and protista). Fungi is the plural when referring to organisms (i.e., instances), I am rather referring to the kingdom (i.e., the category).
Thanks for the clarification. It’s still sounding ugly, like if someone decided that the kingdom of mugroomz would include multiple mushrooms, but I guess it’s too late to complain
https://en.wikipedia.org/wiki/Funga