Interviews were conducted in 4 Tai Yai villages in MaeHongSon and ChiangMai
provinceswhoseinhabitantsimmigratedfromMyanmaratdifferenttimes.Discussionsandinterviews
wereheldwith126key-informants(56malesand70females)ranginginagefrom16to80yearsinthree
age groups(age16–40, 41–60, and61–80). Wecalculatedtheinformantconsensusfactor(ICF)foruse
category,usevalueindex(UV)forusereportofplant.Wetesteddifferencesbetweentheknowledgeof
different agegroupsandlocationsusingprincipalcomponentanalysis(PCA).