Leaf Color

Observe the colors different species of leaf turn. Look up in Peterson or, better yet, a biology book, and figure out what makes the various colors. Which trees are most colorful, which least? Read Peterson on colors and foliar fruit flags [226-31], then find out what Darwin thought of leaf color. Can you reconcile the two opinions? Can someone out there explain to me why plants don't use the green spectrum for manufacturing chlorophyll?