Abstract

• In this research, the studied plants were Myanmar medicinal orchids Dendrobium aphyllum belong to the family orchidaceae and locally known as Phayaungpanthit-khwa. This paper conducted morphological character, histological character and phytochemical constituents of the leaves and pseudobulbs of Dendrobium aphyllum (Roxb).C.Ficher were studied.The present studied plants were collected from South Dagon Township, Yangon Division during flowering period from December, 2017 to February, 2018. Fresh plants were grown in home garden. In morphological study, the collected plants were classified and identified with the help of available literatures. The plants were epiphytic herbs, evergreen stem, inflorescence raceme; flowers lavenda. In histological studied free hand section of the leaves and pseudobulbs of fresh specimens were prepared by using the blade and examined by the help of microscope. Anomocytictype of stomata was abundant in lower surface and absent on upper surface. Vascular bundles of leave and pseudobulbs were collateral and closed type. In phytochemical test, the powdered samples were examimed by the method of (Trease and Evens,1989; British pharmacopoeia 1968) . Leaves and pseudobulbs were dried and powdered using the homogenizer. The preliminary phytochemical investigation revealed the presence of, -amino acid, carbohydrates, reducing sugar, glycoside, terpenoids and steroids but tannins, alkaloid, saponin, phenolic compound, flavonoid, starch were not detected in the plant.