Abstract

• Thunbergia laurifolia Lindl. is known as Nwe-nyo belong to the family Acanthaceae. The plant was collected from Hmawbi Township, Yangon Region, during the flowering and fruiting period from December to May, 2019-2020. In this research, morphological characters of leaves, inflorescence, flower, calyx, corolla, androecium and gynoecium are presented. The plant is perennial herbaceous climber; simple leaves, opposite and distichous; terminal inflorescence with racemose flowers are borne; bisexual, zygomorphic flower. In microscopical characters of leaves, the lamina epidermal cells of anticlinal walls were wavy, both surfaces; stomata were present on lower surface, in this type of diacytic (cross celled) stomata type; in the transverse section of lamina, two layers of palisade mesophyll cell and about 7-10 layers of spongy mesophyll cell were present. In midrib outline, both epidermal cells are barrael-shaped; adaxial side and abaxial side are convex. In petiole outline, both epidermal cells are rounded to barrel-shaped. In the diagnostic characters of leaves powdered samples were observed with sensory characters and microscopical characters. These characters of Nwe-nyo plant were identified by many literatures. Furthermore, the results of phytochemical analysis were various extracts of leaves showed the presence of alkaloid, Glycoside, Phenolic compound, flavonoid, steroid/terpenoid, tannin, saponin, α amino acid, protein, reducing sugar, starch and carbohydrate.