Abstract

• The present paper deals with taxonomic study on fifteen species of Orchidaceae found in Pinlaung Township, Southern Shan State of Myanmar. This area lies between 19° 40'-20° 30' N latitude and 96° 22'-96° 55' E longitude. The elevation of Pinlaung Township is 1465 m above sea level. The orchid species of this study area were investigated during 2017-2018. All the specimens were collected, and identified by referring to Hooker, Backer & Brink, Pedersen et al., Xinqi et al.. In this paper, 15 species belonging to 11 genera were presented. Among them, 11 species were epiphyte and 4 species were terrestrial. Two pollinia were found in 6 species and four pollinia in 9 species. The morphological characters of the individual species were presented with relevant photographs. An artificial key to the species was constructed. The valuable information of orchid species found in Pinlaung Township of Southern Shan State will provide to further researchers.