▁The ▁m ush room ▁is ▁commonly ▁known ▁as ▁the ▁" cluster ed ▁bon net " ▁or ▁the ▁" o ak - st ump ▁bon net ▁cap ". ▁ ▁Description ▁ ▁The ▁cap ▁is ▁light ▁re dd ish - b rown , ▁with ▁a ▁diameter ▁typically ▁r anging ▁from ▁. ▁Initial ly ▁con ic ▁to ▁bell - sh aped ▁to ▁convex , ▁it ▁fl att ens ▁during ▁m atur ity , ▁developing ▁visible ▁surface ▁gro ov es ▁corresponding ▁to ▁the ▁g ills ▁under ne ath ▁the ▁cap . ▁The ▁margin ▁of ▁the ▁cap ▁ ▁has ▁minute ▁but ▁distinct ▁scal lo ps . ▁The ▁surface ▁is ▁mo ist ▁and ▁smooth , ▁and ▁h yg ro phan ous . ▁The ▁cap ▁frequently ▁develop s ▁spl its ▁in ▁the ▁margin , ▁or ▁cra cks ▁in ▁the ▁disc ▁( the ▁central ▁part ▁of ▁the ▁cap ). ▁The ▁flesh ▁of ▁the ▁cap ▁is ▁thick ▁in ▁the ▁center ▁but ▁thin ▁elsewhere , ▁gray ish ▁to ▁wh it ish , ▁frag ile , ▁and ▁with ▁a ▁slightly ▁me aly ▁od or ▁and ▁taste . ▁The ▁g ills ▁have ▁a ▁dec urrent ▁attachment ▁to ▁the ▁stem ▁( that ▁is , ▁running ▁down ▁the ▁length ▁of ▁the ▁stem ) ▁and ▁are ▁a ▁pale ▁brown ish ▁color ▁with ▁t ing es ▁of ▁red . ▁They ▁are ▁broad ▁( between ▁ 3 ▁and ▁ 6   mm ), ▁and ▁have ▁a ▁close ▁to ▁sub dist ant ▁spacing , ▁with ▁about ▁ 2 6 – 3 5 ▁g ills ▁reaching ▁the ▁stem . ▁The ▁frag ile