Study on the Population Status and Epiphytic Community Characteristics of Holcoglossum omeiensee

Holcoglossum omeiense Z.H.Tsi ex X.H.Jin is an endemic species of China, and it is also endangered wild plants with extremely small population. In order to understand the current status of H. omeienseʼs germplasm resources and find out the position of its epiphytic host in the community, field investigation was carried out in Mount Emei and its adjacent areas for five consecutive years, and finally the epiphytic community was investigated by typical sample method in 2021. The results showed that: (1) There was only one distribution area of wild H. omeiense population and the population number was less than 300. The natural fruiting rate was extremely low, and the proportion of seedlings was low. (2) H. omeiense was epiphytic on 15 hosts of 8 tree species in 11 distribution points in this distribution area, and the epiphytic point was often higher than 10 meters. Phoebe zhennan was the main host, and H. omeiense had an epiphytic preference for it. (3) There were 140 species of vascular plants in the epiphytic community and H. omeiense was the only orchid. P. zhennan, the main host, was the dominant species in the arbor layer with the highest importance value. H. omeiense was the dominant species in the herb layer of the community. The community was tropical in distribution, and the analysis of genera showed that the community had a tendency of transition to warm temperate zone. It is suggested that the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible.