New wood for the caves and cliffs update

There would be some kind of mushroom or tree that would be growing underground in the caves and cliffs update. There would be two different kinds of mushroom/tree one black and one white. Both having their own planks as well. The leaves/top of the mushroom would be coloured according to the tree/mushroom and be slightly transparent. Because they get so little light where they are they would have a higher chance of spawning near a lava lake.
Maybe there could also be some restriction to the light level at which the sapling could grow making it harder to farm safely.