Here is the dissected anatomy of a tree shaft - it's made of subordinate tubes that cling together to make the bigger form.
Here are some good and rude trees to practice hierarchy on.
irresistible urge to peel apart from each other. They want to escape the domination of the tree, but the power at the center is too massive to pull totally away from.
These tree tumors look fun to draw. They lack shame.
Frazetta's approach to trees and hierarchy is similar to Post's. He doesn't paint every detail. Instead he suggests the major forms and some of the sub forms that crawl along the overall shape of the trees. Also like Post, he uses liberal and pleasing negative spaces to frame the solid objects in the compositions.
Frazetta's details are wrapped around the direction and form of the twisting tortured tubes of tree meat. Smooth buttocks help set off the rugged texture of the trees.
Trees compose around characters.