title: A new species of Eustigma (Hamamelidaceae) from Hon Ba Nature Reserve, Vietnam.
abstract: A new species of Hamamelidaceae, Eustigma honbaense H.Toyama, Tagane & V.S.Dang, sp. nov., is described from Hon Ba Nature Reserve, Vietnam. This species is similar to Eustigma oblongifolium Gardner & Champ., but differs from it in having entire leaves, longer infructescences, capsules with a longer apical part and seeds with a larger hilum. A description, preliminary conservation assessment, illustration and photographs of the new species are provided, as well as an updated key to the genus Eustigma.
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: 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: University of Science Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam.
authors.forename: Hop
authors.initials: H
authors.lastname: Tran
authors.affiliation: The Kyoto UniversityMuseum, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Nagamasu
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: Center for Asian Conservation Ecology, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Tetsukazu
authors.initials: T
authors.lastname: Yahara
keywords: DNA barcoding; Indochina; flora; matK; rbcL; taxonomy