Hell Biome

[WheatPriest]

Where can I find more information about the Hell biome? I couldn't find it on the wiki, and when I search for "BTA Hell" I just get results of people using the word hell. I'm trying to figure out what can grow there, if there are any tree saplings available, what mobs spawn there, does water exist, et cetera. I'm basically asking what the limitations are in a hell world.