Two new species of Polyalthiopsis(Annonaceae) based on morphological characters and phylogenetic evidence,with a supplementary description of P.chinensis from China  

作　　者：Bin Yang Jin-Yue Li Rui-Jie Yang Hong-Bo Ding Min Deng Chun-Fen Xiao Yun-Juan Zuo Yun-Hong Tan 

机构地区：[1]Southeast Asia Biodiversity Research Institute,Chinese Academy of Sciences&Center for Integrative Conservation,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,Yunnan,China [2]The Key Laboratory of Rare and Endangered Forest Plants of National Forestry and Grassland Administration&The Key Laboratory for Silviculture and Forest Resources Development of Yunnan Province,Yunnan Academy of Forestry and Grassland,Kunming 650201,Yunnan,China [3]College of Life Science,University of Chinese Academy of Sciences,Huairou District,Beijing 101408,China [4]School of Ecology and Environmental Science,Yunnan University,Kunming 650091,Yunnan,China [5]Center for Gardening and Horticulture,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,Yunnan,China

出　　处：《Plant Diversity》2023年第2期185-198,共14页植物多样性（英文版）

基　　金：funded by the National Natural Science Foundation of China (Grants Nos.31900180 and 31970223);the Special Fund of Yunnan Fundamental Research Projects (Grant No.202101AT070058);the project of the Yunnan Academy of Forestry and Grassland (Grant No.KFJJ21-01);the Project of National Plant Specimen Resource Center (NPSRC) (E0117G1001);the Biodiversity Investigation Observation and Assessment Program (2019-2023) of Ministry of Ecology and Environment of China;the project of the Southeast Asia Biodiversity Research Institute,Chinese Academy of Sciences (Grant No.Y4ZK111B01)。

摘　　要：Two new species of Polyalthiopsis(Annonaceae),P.nigra Y.H.Tan & Bin Yang from Guangxi and Yunnan Provinces and P.xui Y.H.Tan & Bin Yang from Yunnan Province,are described and illustrated.P.nigra is morphologically similar to P.chinensis in having narrowly elliptic-oblong,lemon to yellowish green petals,but differs by having obovoid monocarps,a higher number of leaf secondary veins,leaf blades usually widest above the middle,and a lower ratio of leaf blade length to width.P.xui is morphologically similar to P.floribunda in having axillary inflorescences,1-3(-4) flowers,elliptic leaves,and ellipticovate petals,but differs in the numbers of carpels per flower and ovules per carpel.The molecular phylogenetic analysis using five plastid markers confirm that the two new species belong to the genus Polyalthiopsis and show clear interspecific divergences between P.nigra and P.xui and between them and other species in the genus.Detailed descriptions,colored photographs,and habitat and distribution data for the two new species are provided.In addition,the fruit morphology of P.chinensis is described for the first time,based on living collections.Geographical distributions and a diagnostic key for all Polyalthiopsis species are also presented.

关 键 词：ANNONACEAE MORPHOLOGY Polyalthia Polyalthiopsis Southeast Yunnan 

分 类 号：Q949.747.3[生物学—植物学]