Lam Mai Thi Xuan, Jagou Marie-Stella, Van Giang Quoc, Martos Florent, Nguyen Truc Thi Ngoc, Do Truong Van, de Almeida Rafael Felipe, Tran Hoa Dang, Tran Khoa Dang, Nguyen Giang Thi, Tran Dong Phuong, Huynh Ky, Rivière Jean-Noël, Rouget Mathieu, Dinh Diep Quang, Le Anh Tuan, Trinh Xuan Thi, Deguine Jean-Philippe, Lefeuvre Pierre
College of Agriculture, Can Tho University, Can Tho, Vietnam Can Tho University Can Tho Vietnam.
Université de La Réunion, UMR PVBMT, F-97410 St Pierre, La Réunion, France CIRAD, UMR PVBMT La Réunion France.
PhytoKeys. 2025 Jun 2;256:221-238. doi: 10.3897/phytokeys.256.148573. eCollection 2025.
(Malpighiaceae) is a genus almost exclusively native to Asia, with a single species, , being a noxious invasive plant in several areas of the world and particularly threatening the native flora of the Mascarene Islands. Whereas 17 species have been reported from Vietnam, there is currently no available genetic information that could be used to confirm the species diversity in the country. Through a study combining phylogenetic and morphological analyses of newly-collected samples and herbarium specimens, we were able to accurately identify five species in Vietnam. One of these, , represents a species new to science. Specimens of the new species show white to slightly pink petals, erect to forward-curved petals, eight tiny calyx glands and wingless fruits, a unique feature within this genus. Our results strongly support Vietnam as one of the diversity centres of the genus with 18 species out of the 48 species. Although we could not determine the source of introduction of in the Mascarenes Archipelago, our findings highlight the genetic similarity of all samples collected in its secondary distribution areas, suggesting a probable single introduction. This is consistent with historical reports dating the plant's introduction to the Mascarenes to the 18 century.
（金虎尾科）是一个几乎仅原产于亚洲的属，有一个物种，在世界多个地区是有害入侵植物，尤其威胁着马斯克林群岛的本土植物群。虽然越南已报道有17个物种，但目前尚无可用的遗传信息来确认该国的物种多样性。通过对新采集的样本和标本馆标本进行系统发育和形态分析相结合的研究，我们得以准确鉴定出越南的5个物种。其中之一，是一个科学上新发现的物种。新物种的标本显示花瓣白色至微粉色，花瓣直立至向前弯曲，有八个微小的花萼腺体且果实无翅，这是该属内的一个独特特征。我们的结果有力地支持越南是该属的多样性中心之一，48个物种中有18个物种分布于此。尽管我们无法确定在马斯克林群岛的引入来源，但我们的发现突出了在其次生分布区采集的所有样本的遗传相似性，表明可能是单次引入。这与将该植物引入马斯克林群岛的历史报告可追溯到18世纪是一致的。
