These forms are the regular Jungle Biome, the Mountainous Jungle Biome, the Jungle Edge Biome, and the Mountainous Jungle Edge Biome.
Normally, you will very rarely see the Jungle Edge variants of the Biome, but they are hardly noticeable as Jungles when you do see them.
As the rainforest and jungle in real life are dense in terms of plant life, these Leaf Blocks on the floor are meant to simulate a bush you would find in the real-life equivalent.
Having a base composed of four blocks that extend upward as far as the tree does, these Large Jungle Trees contain plenty of wood for collecting resources.
These features can come in the form of mobs, new blocks, structures, items, and other various things along those lines.
When players see these new Biomes for the first time, they can easily be very hesitant in experimenting with the environment, as it may or may not have repercussions.
Jungle trees come in two variants, Small and Large.
Jungle Trees are usually covered in Vines, which are completely climbable by the player.