广西景天科景天属植物小志

Notes on Sedum L.(Crassulaceae)of Guangxi

关键词:  景天科, 景天属, 物种多样性, 新记录, 广西

Key words:  Crassulaceae, Sedum, species diversity, new record, Guangxi

摘要:

该文基于文献考证、馆藏标本鉴定及野外调查,对广西景天属(Sedum L.)植物进行了系统的梳理,对景天属植物物种多样性进行概述,确定目前分布有17种,其中有6个新记录种。该文概述了广西景天属植物物种多样性,订正了藓状景天(S. polytrichoides Hemsl.),简述了6个新记录种,即钝萼景天(S. leblancae Hamet.)、黎平景天(S. lipingense R. B. Zhang, D. Tan & R. X. Wei)、龙泉景天(S. lungtsuanense S. H. Fu)、圆叶景天(S. makinoi Maxim.)、细小景天(S. subtile Miq.)、土佐景天(S. tosaense Makino),并提供其形态特征集要与彩色照片。该文还对广西景天属植物的多样性以及资源潜在利用价值等进行了讨论,并附有分种检索表和各个分类群在广西的分布情况,为该属后续的研究与利用提供了本底资料。

Abstract:

Based on literature research, specimen identification and field investigation, we systematically cleared up the early researches of Sedum L. and conducted an overview for the species diversity of Sedum in Guangxi. There are 17 species were confirmed, among which six species were newly recorded. The research brief histories of Sedum taxonomy in Guangxi were summarized, information for S. polytrichoides Hemsl. was revised. Six newly recorded species of Sedum were reported here, which were S. leblancae Hamet., S. lipingense R. B. Zhang, D. Tan & R. X. Wei, S. lungtsuanense S. H. Fu, S. makinoi Maxim., S. subtile Miq., S. tosaense Makino, and the morphological feature diagnosis and color photographs for these newly recorded species were provided. The species diversity and the potential utilization of Sedum in Guangxi were discussed, and key for species and the distribution of each taxa in Guangxi were provided. This study provides background information for the subsequent research and utilization of this genus.