Abstract

• The plant Artocarpus lamellosus Blanco belongs to the family Moraceae. It is collected from University of Yangon Campus, Kamayut Township during flowering and fruiting period in 2022. This plant is an unrecorded species in Myanmar. It possesses high medicinal value especially in the treatment of inflammation, malarial fever, ulcers, diarrhea, obesity and diabetes. Thus, this plant was selected for further investigation. The collected plants were classified and identified according to standard procedures. In this paper, morphological and histological characters of leaves were investigated. In morphological study, this plant was a monoecious tree with simple leaves, stipulate. Inflorescences (also called syncarp) were axillary and terminal, capitate. Flowers were yellow, unisexual. The fruits were syncarp (aggregate fruit). In histological study, epidermal cells of both surfaces were polygonal in shape with slightly wavy anticlinal walls. Stomata were found only the lower surface and anomocytic type. Cystoliths were present in epidermal cells of lamina and laticiferous were present on the surface view and transverse sections of midrib, petiole and stems. Unicellular and glandular trichomes were present on the surface of petiole and stem but midrib was present only one type unicellular trichomes. In addition, the powdered sample of leaves were investigated and presented as diagnostic characters for medicinal purposes.