The information on traditional knowledge of medicinal plants was gathered through free listing interview and guided tours in homegardens, cultivated fields and nearby forest. During the survey, we noted vernacular names of each medicinal plant and which part of the plant, which mode of preparation, and which routes of administration were used. Each species was photographed, and voucher specimens were collected and subsequently deposited in the herbarium of the Ethnobotany and Northern Thai Flora Research Section, Department of Biology, Faculty of Science, Chiang Mai University and Queen Sirikit Botanic Garden Herbarium (QBG), Chiang Mai, Thailand. Plant identification was based largely on taxonomic literature such as Flora of Thailand, Flora of China and Flora of Java and on comparison with voucher specimens in the QBG.
To determine prevalence of medicinal plant knowledge and culturally important species, we carried out a second survey concerning traditional knowledge and actual uses of medicinal plants in the form of a questionnaire interview following the methods described by Srithi et al., 2009 and Srithi et al., 2012. This was done from October 2011 through April 2012 with 438 additional informants. In total, 206 females and 232 males were randomly selected in six stratified age groups (Table 1). In each village, all medicinal plant species data obtained from a key informant who resides in that village were prepared for the semi-structured interview. During the interview, plant pictures and the Karen plant names were shown to the informant. The questions were asked individually concerning their actual medicinal use together with questions about what plant part was used, mode of preparation, and route of administration. The semi-structured interviews were conducted in Thai in the presence of a translator when the informants could not communicate in Thai.
The information on traditional knowledge of medicinal plants was gathered through free listing interview and guided tours in homegardens, cultivated fields and nearby forest. During the survey, we noted vernacular names of each medicinal plant and which part of the plant, which mode of preparation, and which routes of administration were used. Each species was photographed, and voucher specimens were collected and subsequently deposited in the herbarium of the Ethnobotany and Northern Thai Flora Research Section, Department of Biology, Faculty of Science, Chiang Mai University and Queen Sirikit Botanic Garden Herbarium (QBG), Chiang Mai, Thailand. Plant identification was based largely on taxonomic literature such as Flora of Thailand, Flora of China and Flora of Java and on comparison with voucher specimens in the QBG.To determine prevalence of medicinal plant knowledge and culturally important species, we carried out a second survey concerning traditional knowledge and actual uses of medicinal plants in the form of a questionnaire interview following the methods described by Srithi et al., 2009 and Srithi et al., 2012. This was done from October 2011 through April 2012 with 438 additional informants. In total, 206 females and 232 males were randomly selected in six stratified age groups (Table 1). In each village, all medicinal plant species data obtained from a key informant who resides in that village were prepared for the semi-structured interview. During the interview, plant pictures and the Karen plant names were shown to the informant. The questions were asked individually concerning their actual medicinal use together with questions about what plant part was used, mode of preparation, and route of administration. The semi-structured interviews were conducted in Thai in the presence of a translator when the informants could not communicate in Thai.
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