Nguyen Thi Hai, Bui Thu Ha, Nguyen Khanh Diep and Cao Hoang Tuan 2026. Original article adaptive leaf anatomical characteristics of Lysimachia vietnamensis and Lysimachia insignis in Yen Thuan commune, Cham Chu nature Reserve, Tuyen Quang province. Version B of Vietnam Journal of Science and Technology. (Jan. 2026). DOI:https://doi.org/10.31276/VJST.2025.3536.