The combination of the high biodiversity and many ethnicities in Thailand results in extensive ethnobotanical studies, especially in the northern part of the country. Here we have assembled 7620 records from 60 references regarding how plants are used for food among 14 ethnicities in northern Thailand. The uses are based on 1182 different plant species. Vegetables are the most common food category, which contributed more than 60% of all use-reports and involved nearly 900 species. This was followed by the dessert fruit category, which included about 350 species and over 1800 use-reports. The similarity among the different ethnicities was low and the number of uses and species recorded among different ethnicities were significantly related to the number of studies that had been conducted for each group. This implies that additional ethnobotanical studies are still needed in order to conserve and compile the valuable traditional knowledge related to food plants. Many exotic species are now an important part of traditional knowledge, whereas rare endemic species are uncommon among wild food plants. This situation leads to a loss of traditional knowledge about food plants and reduced awareness of their importance. As a key to using this great reservoir of food for local people, traditional knowledge related to local wild food plants can contribute to the zero-hunger goal of the Sustainable Development Goal (SDG). More studies on the nutrient content and health properties of these plants could lead to the development of new crops to meet present consumer demands.

Inta A, Trisonthi C, Pongamornkul W, Panyadee P. 2023. Ethnobotany of Zingiberaceae in Mae Hong Son, Northern Thailand. Biodiversitas 24: 2114-2124. Zingiberaceae (ginger family) is one of the most important used plant families in Thailand. In this study, the uses of ginger species among the ethnic groups in Mae Hong Son province, northern Thailand, was investigated, which aims to answer these questions: how much diversity of ginger species is being used by the ethnicities in northern Thailand; which use categories are a most important use of ginger species? and which species or genera are the most important? The qualitative and quantitative ethnobotanical investigations were conducted with informants through semi-structured interviewing during a walk-in-the-woods in the forest around the villages and home gardens. The importance of each ginger species was compared using the ethnobotanical indices, including use-report (UR), cultural importance index (CI), fidelity level (FL), and informant agreement ratio (IAR). Therefore, 1,218 use reports of local Zingiberaceae were recorded, belonging to six use categories; 33 native ginger species of 9 genera were found. Food and medicine are the two most dominant use categories, with 572 and 446 use reports, respectively. According to the number of UR and CI, the most important local Zingiberaceae species were Zingiber purpureum, Curcuma longa, Alpinia galanga, Z. officinale, Z. ottensii, Z. rubens and Amomum siamense, respectively. About half of the ethnomedicinal ginger species found in this study were first reported for their medicinal properties.

Ethnomedicinal studies have demonstrated that Fabaceae include the highest number of medicinal species of all plant families in Thailand. To evaluate which legumes hold the greatest potential for development of public herbal medicines, we used ethnobotanical indices to screen traditional medicinal species from 152 literature sources published from 1986–2019. The homogeneity of each use category was evaluated using the informant consensus factor (ICF). The popularity of the used species was evaluated by percentage of fidelity level (FL) and use value (UV). A total of 261 species from 98 genera of legumes were recorded for their traditional medicinal uses. The uses included 5387 use reports that covered treatments of 420 disorders. The ethnobotanical indices pointed to 15 species with high use values (e.g., Biancaea sappan (L.) Tod., Cassia fistula L., Senna siamea (Lam.) H.S.Irwin & Barneby). Nine of these species are already used in public herbal medicine. The other six species should be studied in greater depth, especially to identify their bioactive compounds so they can be developed for use in public herbal medicine.

Millions of people suffer from Musculoskeletal System Disorders (MSDs), including Karen people who work hard in the fields for their subsistence and have done so for generations. This has forced the Karen to use many medicinal plants to treat MSDs. We gathered data from 15 original references covering 27 Karen communities and we document 461 reports of the use of 175 species for treating MSDs among the Karen people in Thailand. The data were analyzed by calculating use values (UV), relative frequency of citation (RFC) and informant consensus factor (ICF). Many use reports and species were from Leguminosae and Zingiberaceae. Roots and leaves were the most used parts, while the preferred preparation methods were decoction and burning. Oral ingestion was the most common form of administration. The most common ailment was muscle pain. Sambucus javanica and Plantago major were the most important species because they had the highest and second-highest values for both UV and RFC, respectively. This study revealed that the Karen people in Thailand use various medicinal plants to treat MSDs. These are the main resources for the further development of inexpensive treatments of MSDs that would benefit not only the Karen, but all people who suffer from MSD.

Ecosystem services from ecosystems have been providing different kinds of goods to people living in and around them. Here, the ecosystem services of the tidal forest in Thailand were investigated using the ethnobotanical research method. A total of 101 informants living around a tidal forest in Rayong Province, Thailand was interviewed using the free-listing technique. Totally, 48 species and 992 uses were recorded. Among these, the highest use value species included Cratoxylum cochinchinense, Garcinia cowa, Melientha suavis, and Nelumbo nucifera. Half of the informants received income from selling plant products which varied from 75 to 4000 USD annually without a significant difference between male and female informants. We found a significant correlation between economic value and the number of use-reports. Most economic species are food plants except one which was weaving material. Gender equality is supported by the ecosystem services since the difference in knowledge and generated income were not observed. Significantly, our results support that economic value is one of the most important factors to promote the recognition of traditional uses of local plants or on the other hand, the service from the ecosystem. Therefore, to conserve the existence of traditional knowledge, efforts from various stakeholders, e.g., the communities and the local and central governments, are required.