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Ethnographic interviews using photographs of 10 traditional Vietnamese fruits and vegetables were used to compare the knowledge level and use of traditional food plants between Vietnamese in urban Bien Hoa, Vietnam, and in Honolulu, Hawai‘i. In both communities, there was a positive correlation between age and knowledge (as measured by correct identification, and number of food uses for the plants). Vietnamese immigrants in Hawai‘i listed more food uses than those in Vietnam due to adoption of multi ethnic foods found in Honolulu.