Armillaria mellea
"Armillaria tabescens" grows quickly at and more slowly at . If the soil is moist, fruiting bodies are abundant. It is the first to fruit in September, compared to "Armillaria mellea" and "Armillaria gallica". The fruiting bodies can be seen even earlier if the season has been exceptionally wet. "Armillaria tabescens" grows poorly on sand and produces shorter rhizomorphs. Rhizomorphs are threadlike structures in fungi that are made up of hyphae. Hyphae are branching structures that release enzymes to absorb nutrients from the host.