Ever wonder which plant has the largest seed? No? Well, now you'll know anyway. The largest seed comes from a tall palm tree called Lodoicea maldivicia, which grows only in the Seychelles in the Indian Ocean. The seed can be 20 inches long!
The seed grows in a fruit that looks like two coconuts joined together. A humorous aside, European sailors that came across the seeds floating in the ocean used to think they looked much like a woman's buttocks. (Things must have been pretty scary on those boats.)
Anyway, for those of you interested in growing one of these, please keep in mind that the seeds take several years to germinate.