I loooove that medusa tree! Man, it looks so soft and squishy with that baggy skin, like a snail or something--it's really lifelike. Those feathery are gorgeous too, so gorgeous that I would abandon the current leaf design right now in favor of the feathery look if only it weren't for the outline-around-the-thin-leaf problem. That's a good texture for the body of the medusa tree too; I think I'll make it into a texture.
Your lizard design is also very good; the way you applied the color makes it look slightly luminous, as though the lizard were being seen in the light shining through a leaf. The head is a keeper for me; I especially like the big round lizard eye and the parrot beak. I'm guessing that the finny things are used for defense against predators. Now, there is one thing that bothers me; the scale of the lizard. The leg that is showing is characteristic of an elephant or rhinoscerous--thick, pillar like, and flattened on the bottom. This is an evolutionary feature of large, heavy animals. So is our lizard a komodo dragon??