Mycorrhizal: living in symbiosis with trees (of mushrooms)
This is a word I should know. Amanitas are mycorrhizal. At the St. Charles cross-country meet today Benjamin and I found lots of amanita muscaria guessowii. They are a fly agaric, supposedly useful for poisoning flies when ground up in milk. This is a yellow variety though, not red. We might try it for our ant problem. We will not attempt any disgusting Siberian pagan rites, however.