广西大瑶山国家级自然保护区新记录种

——南岭开口箭

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中图分类号：Q949.71 文献标志码：A

Abstract： 【Objective】This study aimed to comprehensively ascertain the number of species and morphological characteristics of the Rohdea plantsin Guangxi Dayaoshan National Nature Reserve，in order to lay a foundation for the future conservation，development，and utilization of wild germplasm resources of this genus.【Method】An extensive survey of plant diversity in Guangxi Dayaoshan National Nature Reserve was conducted based on quadrat and line transect methods.The plants seemed to be genus Rohdea Roth of Asparagaceae were first recorded，then collected and introduced to Guangxi Subtropical Crops Research Institute and cultivated. At flowering stage，species identification was conducted based on their morphological characteristics.【Result】The flowers of the population in Guangxi Dayaoshan National Nature Reserve was dissected. It was found that the population flowers had appendages connected with stamen on the top of perigone tube，but the diferences from other species were the smooth inner surface of perianth and stamen，having six costal protrusions in the inner surface of perigone tube，outward-expanding ring-shape succulent appendage with smooth surface，and triangular filaments and appendages with expended base.【Conclusion】Rohdea brachyanthera W.B.Liao，Y.N. Gong& H.Z. Feng has succulent ring-shape appendage on the throat of the corolla tube.Its unique structure in perianth tube and filament differs itself from the known species such as Rohdea japonica （Thunb.） Roth，Rohdea delavayi （Franch.） N.Tanaka and Rohdea watii （C.B.Clarke） Yamashita& M.N. Tamura，making it a newly identified species in Guangxi. This could provide scientific information and a reference for presevation， development and sustainable utilization of the germplasm resources of wild Rohdea plants.

Keywords： Rohdea Roth;new distribution;plant diversity; Guangxi Dayaoshan National Naure Reserve

0 引言

【研究意义】万年青属（RohdeaRoth）植物广布于东喜马拉雅一日本（中国南方，印度东北部、尼泊尔、不丹、缅甸、泰国、老挝、越南、日本）。（剩余17907字）