Anon who started the desert and badlands only biome world here, I don't know how to feel about this. I found a trial chamber which has a mangrove tree growing inside it, you can make as many saplings as you want from the leaves by applying bonemeal to the underside of them. I understand these trees are a right pain to clear up and don't offer much wood but I had hoped logs of any kind would be a few days away from now but hey, this is how things panned out so I'll take the win here even if it is such an annoying tree to take down when fully grown