Divine Caroline blog has a neat post by Midori Nakamura on the world's most unusual plants (and yes, the "shapeless penis" plant made the list!)
This one is Hydnora africana:
Hydnora africana, an unusual flesh-colored, parasitic flower that attacks the nearby roots of shrubby in arid deserts of South Africa. The putrid-smelling blossom attracts herds of carrion beetles.
http://www.divinecaroline.com/article/22167/37205 - via Miss Cellania (Photo: Martin Heigan [Flickr])
To be fair though, most of them are smelly...