@oldman, most of that is what people just want to believe, fact is morels will grow where ever they feel like growing or how do you explain finding morels in a pile of dirt in a parking lot or next to your house where no tree has grown for 50 years or next to highways with no trees or in the middle of railroad tracks growing through rock or in a yard hundreds of yards away from any tree or bushes or the countless other places without trees. If a elm or any other kind of tree that people hunt for in this decay range was the key to morels then EVERY elm or other hunted tree in this decay range would produce not to mention morels could then be mass produced because when facts are known results are duplicated at will. They can and do get reproduced but without any guarantee of growth and without any specific trees involved. I find hundreds of morels in areas without trees and hundreds with trees, some years more in one wooded and some more without. There is one fact to really believe and that is morels can, do and will get found the most unbelievable spots with or without trees. Logged areas may or may not produce just like certain trees/decaying trees may or may not produce. They are a mystery and most likely always will be. The good thing is you have ideas and you follow them with results but claiming to have figured morels out is based on belief and not fact. There's just not many FACTS about how and where morels grow, they just do. In my opinion, if it's roots then it can be ANY kind of root, be it tree,bush,weed,grass, flower or any other kind of root cause that is how many different places they get found. Keep filling those bags!!