Not only do flowering plants have a tremendous diversity of leaf shapes and forms, they are adapted to many different habitats and they have specialized for many other purposes as well. First all those floral parts are modified leaves. Then there are all the other funky things angiosperms have done with leaves: protection, coevolution, traps, succulent leaves, vestigial leaves, climbing aids (tendrils, grappling hooks), attraction, flotation, xerophytic leaves. Why this will be just like a leaf scavenger hunt through the glasshouse, and that's good because the weather outside is appalling: wintery mix (April 23d) at just above freezing. Here's a nice tropical leaf with adaptations for dealing with heavy rainfall: a drip tip and vein gutters. Both help shed water quickly. So what plant has this leaf?