Armillaria fungus

i totally agree with clive. no idea, what i thought then, but a hour ago, when saw the message, i felt a bit ashamed, that i suggested armillaria (maybe it was late, but definitly: i was wrong) , I canot say, which species exactly, but it looks like "gymnopillus" and i will believe/agree "clive", with the "G. Junonius". It's possible and very likely! ( i've learned the last 2-3 month, but will never be "perfect" :) )

i dont think it mellea , but at least genus armillaria

I think it's armillaria root rot disease. To me it looks like armillaria mellea.