Ringless Honey Mushroom is the only Armillaria species without an annulus (ring). Parasitic and pathogenic of oaks and fruit trees. Always found in caespitose clusters of 8 to 50 or more fruiting bodies.
Armillaria tabescens
Armillaria tabescens, ‘Ringless Honey Mushroom’ (Scopoli) Emel (2 Photos and Description)