Or again, there are, as I have said, six million leaves on a big elm. All right . . . but they are toothed, and the teeth themselves are toothed. How many notches and barbs is that to a world? In and out go the intricate leaf edges, and “don’t nobody know why.” All the theories botanists have devised to explain the functions of various leaf shapes tumble under an avalanche of inconsistencies. They simply don’t know, can’t imagine.