<![CDATA[Epiphytic orchids are an important component of tropical forest ecosystems, whose existence is strongly influenced by the characteristics of their host trees. This study aimed to inventory host tree species and analyze their preferences in relation to epiphytic orchids at Balik Bukit Resort, Bukit Barisan Selatan National Park. Data collection was conducted in June 2025 using a 150 m line transect method combined with 20 × 20 m quadrat plots at two observation stations. All tree species serving as substrates for epiphytic orchids were identified and recorded. The results revealed 26 host tree species belonging to 18 families that supported 21 epiphytic orchid species. On average, each host tree supported 1.56 orchid species, with Medang (Dehaasia caesia) identified as the host with the highest orchid diversity. The families Myrtaceae, Euphorbiaceae, and Dilleniaceae were the most dominant host tree groups. Host tree preference by epiphytic orchids Epiphytic orchids primarily preferred host trees based on bark texture, water retention capacity, canopy structure, and the presence of mosses and mycorrhizal fungi. These findings highlight the importance of the quality of microhabitats on host trees in supporting the conservation of key tree species that sustain a high diversity of epiphytic orchids.]]>
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