Leaf shapes are so very interesting as there are so many different types of shapes for different plants. There probably already exists some books, catalogs, or databases that have organized various leaf shapes and patterns. I'm just not sure how comprehensive those collections may be, and if it may be therefore a good idea to organize a truly comprehensive collection.
As a reductionist and scientist, I generally like to determine the various patterns in nature, so simplified versions of shapes by analyzing leaf shapes would be one way to better under nature and the world.
