%0 Journal Article %A Quoc Bao Nguyen %A Ba Vuong Truong %A Shuichiro Tagane %A Tuan Anh Le %A Van Ngot Pham %A Van Toan Em Quach %A Van Huong Bui %A Tran Vy Nguyen %T Taxonomic notes of the genus Eumachia DC. in the flora of Vietnam and description of a new species %D 2025 %J Taiwania %V 70 %N 2 %P 262-274 %U https://taiwania.ntu.edu.tw/abstract/2067 %X The genus Eumachia DC. has been poorly documented and studied in Vietnam. In this research, we provide a taxonomic revision of this genus based on available specimens. Five species, E. chasaliifolia, E. montana, E. ovoidea, E. sondangii, and E. straminea, are recognized in Vietnam: E. sondangii is described as new to science; E. straminea is recorded in the country for the first time; a new combination is provided for E. chasaliifolia, and two lectotypifications are made for Chassalia ovoidea and Psychotria chasaliifolia. For each species, description, color photographs, phenology, distribution, and habitat are provided. A key to the Vietnamese Eumachia species is also provided. %M doi:10.6165/tai.2025.70.262