Glow lichen underground tree

A tree that resembles dark oak trees with glow lichen growing all over it . Think symbiotic relationship as a reason for having a tree underground. Grey wood type kinda like acacia where the bark is Grey while the inside is orange, the inside would be Grey I'll leave the outer bark up to you but something similar to the nether bark would be cool. discolored leafs white ish in color. Or mushroomesque leafs like the nether trees.. If u took time to read this thank you for everything that u do