越南苦苣苔科植物国家级分布新记录——大苞漏斗苣苔（英文）

Notes on taxonomy of Raphiocarpus begoniifolius(Lévl.) Burtt(Gesneriaceae) from Vietnam

漏斗苣苔属(Raphiocarpus Chun)是分布于中国至中南半岛一带的小属,主要产于中国华南西南抵越南北部至中部,但之前中越两国共有分布的该属物种仅有3个种。大苞漏斗苣苔[Raphiocarpus begoniifolius (Lévl.) Burtt]一度被认为是中国的特有种,仅分布在中国的广西西北部、贵州西南部、云南东南部和湖北西北部,尚未见有在越南的相关研究报道。该文首次报道了越南植物区系中大苞漏斗苣苔的国家级分布新记录,使得中越两国共有分布的该属物种上升到了4个种,并着重讨论了大苞漏斗苣苔与其近缘种长筒漏斗苣苔[Raphiocarpus macrosiphon (Hance) Burtt]的区别特征,进一步完善了越南所分布的漏斗苣苔属植物检索表。根据中越两国的各自与联合野外考察工作对该种的濒危现状进行了讨论,为中越两国开展该种乃至该属植物的保育提供了直接证据。凭证标本保存于越南生物资源与生态研究所标本馆(HN)中。

Raphiocarpus Chun is a small genus includes all species from China to Indo-China Peninsula,and mainly distributes from southern and southwestern China to northern and central Vietnam.However,there are only three species can be found in both countries formerly.Raphiocarpus begoniifolius(Lévl.)Burtt was once considered as an endemic species of China,and it is distributed in China(northwestern Guangxi,southwestern Guizhou,southeastern Yunnan and northwestern Hubei),but there is not reported on flora of Vietnam.This species is here reported as the first record for the flora of Vietnam,so it makes the codistributed species number of Raphiocarpus in both countries has been risen from three to four.Notes on taxonomy and distinguishable discussion from its congener,Raphiocarpus macrosiphon(Hance)Burtt,are provided.The further improved key to species of Raphiocarpus in Vietnam is showed here.According to the field studies by both countries,respectively and/or jointly,we also discussed the endangered status of Raphiocarpus begoniifolius so that it furnishes direct evidence for the conservation of this species and,even,this genus in China and Vietnam.The voucher specimens are hold in Herbarium of Institute of Ecology and Biological Resources(HN).