New warm climate biomes: the caatinga and the lush caatinga

In real life, the Caatinga biome (search about it) exists only in Brazil's Northeastern region. Its mostly rural population depends on using and selling products found there (firewood, exclusive fruits and medicinal plants, and even ceramic), not to mention its cultural value; but it is threatened: half of it is transformed into desert. Its representation in Minecraft is important.

There would be two biomes: dry caatinga (coarse dirt as ground and it almost never rains there) and rare lush caatinga (jungle-colored grass and frequent rain).

They would have new flora, such as the caatinga bush, that has two states: dry and lush (each one mostly generated in the respective biome) and can be walked through. The bush looks like a central thin stalk with branches in all directions. A bush block stacks on top of another; they would be two or three blocks tall in generation. Dry bushes have no leaves, lush ones have them jungle-green (this is how they are in real life seasons). Shear or use water bottle in one block and the entire plant is converted to dry or lush, respectively (redstone applications!). Dry caatinga bushes in rain go lush until the rain stops. It can be used as fuel and broken for sticks. Bonemeal grass in caatinga biomes grows more.

Other flora would be tall grass (both heights), sparse acacias, fancy cacti (announced for the badlands update), and new flower bush(es), as the real life biome is pretty diverse in flowers. As for new fauna, armadillos and various birds.