The root they use for this dish is located in South America, so I'm sure other countries use it as well. Please help me locate it!
The information that I have...
On wikipedia: http://en.wikipedia.org/wiki/Pom_%28dish%29
Surinam/The Netherlands: Pom, Pomtajer, Pomtayer
Bolivia: Walusa, Gualuza
Colombia: Bore, Malangay
Costa Rica: Tiquizque, Tiquisque, Macal
Mexico: Mafafa, Quiscamote, Macal, Queiquexque
Nicaragua: Quequisque
Panama: Otoy, Otó
Brazil: Nampi, Malanga
Puerto Rico: Yautía
Antilles: Malanga, Tannia, Taniera
Honduras: Quiscamote
Venezuela: Okumo
Peru: Uncucha
Botanical name: Xanthosoma sagittifolium
In English: Tannia, Tania, Yautia, Pomtajer
In Portuguese: Taioba, Mangareto, Mangarito, Mangarás
In French: Chou
Some pictures:
Or even better, grated and frozen:
Who has seen this before?