This plant is native to Southeast Asia, and is thought to be a natural cross between Alocasia macrorrhizos and Colocasia esculenta (Taro). The stems are eaten as a vegetable in Southeast Asia, particularly Vietnam, and in Japan. The root corms of this species are fibrous and inedible, and the leaves are not particularly edible either.
More on Arums.
The photo to the left shows what the plant looks like. Some varieties
can grow leaves up to 5 feet across. The stems are peeled and used as
slices or short segments, mostly in soups. They have little flavor, but
are valued for their foamy sponge-like texture and ability to hold a lot
of the broth flavor.
Photo by Dick Culbert distributed under license
Creative Commons
Attribution-ShareAlike v2.0 Generic.