Long yams

Dr. Boli mentioned that the Metropolitan Museum of Art was making some of its coffee-table books freely available. In the book on art of Oceania, page 65, it says: "The Abelam recognize and cultivate two distinct categories of yams, a small variety used as ordinary food and long yams--massive tubers that commonly attain lengths of six to nine feet and, in exceptional cases, can be up to twelve feet long. An Abelam man's social standing is determined not only by his abilities as an orator and, formerly, a warrior; it is also, quite literally, measured by his success in growing long yams."

UPDATE: For more details there's an Abelam culture web site.