Men are from Mars, and fly traps are generally from Venus. This one, however, is from a previously unknown country called "Spain." They grow on the plains there, and the rain that falls there makes them grow big, carnivorous, and ill-tempered. The strange growth on the fly trap's head, which looks vaguely like a sombrero from South of the Border, is generally regarded as an example of analagous evolution. It's certainly not in the same homeobox as other sombreros. Huh huh... homeobox.