广西被子植物新资料

New records of angiosperms in Guangxi

关键词:  中越边境, 新记录, 石灰岩植物区系, 补充描述

Key words:  Sino-Vietnamese border, new records, limestone flora, supplementary description

摘要:

桂西南喀斯特地区是广西也是中国生物多样性保护优先区域。基于该地区关键区域的深入调查,该文报道了广西被子植物新记录20种,即木姜叶征镒木 [Wuodendron praecox (Hook. f. & Thomson)B. Xue, Y. H. Tan & X. L. Hou]、大果楠(Phoebe macrocarpa C. Y. Wu)、国楣铁线莲(Clematis fengii W. T. Wang)、方籽栝楼(Trichosanthes tetragonosperma C. Y. Cheng & Yueh)、枥叶花楸(Sorbus yunnanensis L. T. Lu)、长苞楼梯草(Elatostema longibracteatum W. T. Wang)、富宁槭(Acer paihengii Fang)、云南山茱萸(Cornus eydeana Q. Y. Xiang & Y. M. Shui)、长梗杜鹃(Rhododendron longipedicellatum Lei Cai & Y. P. Ma)、粉花安息香(Styrax roseus Dunn)、滇南山矾(Symplocos hookeri C. B. Clarke)、歧笔菊(Dicercoclados triplinervis C. Jeffrey & Y. L. Chen)、海桐状香草(Lysimachia pittosporoides C. Y. Wu)、麻栗坡红丝线(Lycianthes marlipoensis C. Y. Wu & S. C. Huang)、百节赛爵床(Justicia multinodis Benoist)、西畴黄芩(Scutellaria sichourensis C. Y. Wu & H. W. Li)、折唇羊耳蒜(Liparis bistriata C. S. P. Parish & Rchb. f.)、细茎阔蕊兰(Peristylus tenuicallus Ormerod)、滇南苹兰 [Pinalia yunnanensis (S. C. Chen & Z. H. Tsi)S. C. Chen & J. J. Wood]、全唇线柱兰(Zeuxine integrilabella C. S. Leou),隶属于17科20属,其中征镒木属(Wuodendron B. Xue, Y. H. Tan & Chaowasku)和歧笔菊属(Dicercoclados C. Jeffrey & Y. L. Chen)为广西新记录属,同时提供了这些物种的形态描述、引证标本、地理分布和图片。此外,基于收集的材料,就方籽栝楼、歧笔菊的部分关键分类学特征作了详细的补充与修订。最后,讨论了新记录属种发现的生物地理学意义以及桂西南喀斯特地区的生物多样性保护工作。

Abstract:

The limestone region in Southwest Guangxi is defined as a priority area for biodiversity conservation and research not only at provincial but also at national level. Through in-depth investigation in the two nature reserves of this region, 20 angiosperm species from 20 genera and 17 families were found as new records for the flora of Guangxi, including Wuodendron praecox (Hook. f. & Thomson)B. Xue, Y. H. Tan & X. L. Hou, Phoebe macrocarpa C. Y. Wu, Clematis fengii W. T. Wang, Trichosanthes tetragonosperma C. Y. Cheng & Yueh, Sorbus yunnanensis L. T. Lu, Elatostema longibracteatum W. T. Wang, Acer paihengii Fang, Cornus eydeana Q. Y. Xiang & Y. M. Shui, Rhododendron longipedicellatum Lei Cai & Y. P. Ma, Styrax roseus Dunn, Symplocos hookeri C. B. Clarke, Dicercoclados triplinervis C. Jeffrey & Y. L. Chen, Lysimachia pittosporoides C. Y. Wu, Lycianthes marlipoensis C. Y. Wu & S. C. Huang, Justicia multinodis Benoist, Scutellaria sichourensis C. Y. Wu & H. W. Li, Liparis bistriata C. S. P. Parish & Rchb. f., Peristylus tenuicallus Ormerod, Pinalia yunnanensis(S. C. Chen & Z. H. Tsi)S. C. Chen & J. J. Wood and Zeuxine integrilabella C. S. Leou. Among them, Wuodendron B. Xue, Y. H. Tan & Chaowasku and Dicercoclados C. Jeffrey & Y. L. Chen were new recorded genera of Guangxi. All species were annotated by morphological and distribution description, voucher specimens and pictures. In addition, based on collected materials, several key taxonomic characteristics of Trichosanthes tetragonosperma C. Y. Cheng & Yueh and Dicercoclados triplinervis C. Jeffrey & Y. L. Chen were supplemented and revised respectively. Lastly, the biogeographic significance of these newly records as well as protection effectiveness of the reserves in limestone region of southwestern Guangxi were discussed.