VNU Journal of Science: Medical and Pharmaceutical Sciences, Vol. 36, No. 2 (2020) 24-31 24 Original Article Study on Morphological and Microscopic Characteristics of Abelmoschus sagittifolius (Kurz) Merr. in Vietnam Pham Thanh Huyen 1,* , Nguyen Quynh Nga 1 , Pham Thi Ngoc 1 , Lai Viet Hung 1 , Phan Van Truong 1 , Nguyen Van Hieu 1 , Dang Minh Tu 1 , Nguyen Thi Ha Ly 1 , Duong Thi Phuong Thao 2 , Pham Thi Hong Nhung 2 , Dinh Doan Long 2 1 National Institute of Medicinal Materials, 3B Quang Trung, Hoan Kiem, Hanoi, Vietnam 2 VNU University of Medicine and Pharmacy, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam Received 10 May 2021 Revised 26 May 2021; Accepted 04 June 2021 Abstract: Sam bo chinh (Abelmoschus sagittifolius (Kurz) Merr.) is a precious medicinal plant that has been exploited and planted in Vietnam for a long time. However, the morphological characteristics of this plant is easy to confuse with other species of the same genus. In addition, the microscopic characteristics and medicinal powder composition of this medicinal plant have not been comprehensively described. The present investigation was aimed to determine the morphological and microscopic characters of Sam bo chinh using comparative morphology, anatomical research and medicinal powder analysis. The complete description of morphological and microscopic characteristics reported in this study will serve as valuable data for the conservation and development of this species in Vietnam. Keywords: Morphology, microscopic characteristics, medicinal plant, Abelmoschus sagittifolius * ________ * Corresponding author. E-mail address: huyenptnim@gmail.com https://doi.org/10.25073/2588-1132/vnumps.4322