How do I get rid of these annoying jungle trees

 I need help, I'm making a mod that adds 4 new dimensions and several new biomes, one of the biomes uses moss blocks as the surface, but big azalea trees shaped like mega jungle trees are spawning and I don't know why, I didn't add them to my biome. does anyone know why they're spawning and how to get rid of them, I never added them and I can't find anything in my workspace that is causing this, pls help.