Looking for a dumb giant mushroom

I'm not sure if this is the right place for this, but I'm having some issues. I wanted to farm dark mushroom for the dye it drops but I have no idea where it spawns in the map, ive searched all over and killed random mobs multiple times in hopes it will appear. Now I'm just lost and out of options so I thought I'd ask the wise community here lol

 

Thanks omg u saved a life

 

Hope this helps. ^_^

 

So many yellow arrows

 

I got the map from google search because we have maintenance earlier, but I didn't forget to put the mushroom icon for a quick find. ^_^

 

just enter Istmus of Kaus and walk on the right side. always stay on the outer ring, eventually you will reach a place where mushrooms spawn. behind them is a small corner, there you will find the big one.
=(^.^)=