title: Aporosa tetragona Tagane & V. S. Dang (Phyllanthaceae), a new species from Mt. Hon Ba, Vietnam.
abstract: A new species, Aporosa tetragona Tagane & V. S. Dang, sp. nov., is described and illustrated from Mt. Hon Ba located in the Khanh Hoa Province, South Vietnam. This species is characterized by tetragonal pistillate flowers and fruits, which are clearly distinguishable from the other previously known species of the genus. The morphology and phylogeny based on rbcL and matK of this species indicated that the new species belongs to section Appendiculatae Pax & K. Hoffm.
authors.affiliation: Center for Asian Conservation Ecology, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Shuichiro
authors.initials: S
authors.lastname: Tagane
authors.affiliation: Center for Asian Conservation Ecology, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Van Son
authors.initials: VS
authors.lastname: Dang
authors.affiliation: Center for Asian Conservation Ecology, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Toyama
authors.affiliation: Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907-1541 Japan.
authors.forename: Akiyo
authors.initials: A
authors.lastname: Naiki
authors.affiliation: The Kyoto University Museum, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan.
authors.lastname: Hidetoshi Nagamasu
authors.affiliation: Center for Asian Conservation Ecology, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Tetsukazu
authors.initials: T
authors.lastname: Yahara
authors.affiliation: University of Science Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam.
authors.forename: Hop
authors.initials: H
authors.lastname: Tran
keywords: Aporosa; Hon Ba Nature Reserve; Phyllanthaceae; Vietnam; new species