Leaf
Leaves are the most versatile parts of all plants. Take for instance the bougainvillea. Its leaves not only act as sites for food production, but as flowers as well. Most leaves also have oily-like coatings on their surface to conserve water loss through pore evaporation. Of all leaves available, I think the ones that belong to the water hyacinth are my favorite.
But I have no clue what the leaf above is.