rakaea glyptodon: an orchid. It is the color of, and smells like, raw meat. Pollinated by male wasps.
Dracunculus vulgaris: smells like rotting flesh, and has a burgundy-colored, leaf-like flower that projects a slender, black appendage.
Amorphophallus: means, literally, "shapeless penis." The name comes from the shape of the erect black spadix.
Wolffia angusta: the world's smallest flower. A dozen plants would easily fit on the head of a pin and two plants in full bloom will fit inside a small printed letter "o."