Subjects: Biology >> Botany >> Applied botany submitted time 2023-09-20 Cooperative journals: 《广西植物》
Abstract： Seventeen newly recorded species from Guangxi, China are reported, including Yinshania henryi (Oliv.) Y. H. Zhang, Lepidium didymum L., Rumex acetosella L., Impatiens chekiangensis Y. L. Chen, Pittosporum kweichowense Gowda, Reevesia orbicularis Tardieu, Itea ilicifolia Oliv., Eriobotrya henryi Nakai, Myrsine verruculosa (C. Chen) Pipoly & C. Chen, Mycetia hirta Hutch., Spermacoce exilis (L. O. Williams) C. D. Adams, Picris divaricata Vaniot, Mazus gracilis Hemsl. ex Forbes et Hemsl., Viburnum rhytidophyllum Hemsl., Caryopteris nepetifolia (Benth.) Maxim., Salvia nanchuanensis var. pteridifolia Sun, and Smilax elegantissima Gagnep. These newly recorded species are of great value to the study of floristic geography, the innovative utilization of plant resources and the protection of plant diversity in Guangxi. The invasiveness of Lepidium didymum L. and Spermacoce exilis (L. O. Williams) C. D. Adams, which are alien species, was evaluated. The medicinal efficacy of Yinshania henryi (Oliver) Y. H. Zhang, Lepidium didymum L., Rumex acetosella L., Picris divaricata Vaniot, Mazus gracilis Hemsl. ex Forbes et Hemsl., Schnabelia nepetifolia (Benth.) P. D. Cantino, Salvia nanchuanensis var. pteridifolia Sun, Viburnum rhytidophyllum Hemsl., Itea ilicifolia Oliv., which are new records of medicinal plants in Guangxi, was briefly summarized. The voucher specimens, geographical distribution and plant photographs are also provided for each species.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-06-07 Cooperative journals: 《广西植物》
Abstract： Type specimens are not only the basis and evidence of plant classification, but also important basic data for the protection and sustainable utilization of plant resources. In order to promote the full utilization and reciprocal sharing of type specimens in IBK, the species, collecting locality, collecting date and collector of them were counted and analysed respectively. The results were as follows：(1) Based on the digital information of 4 645 collections and 5 736 herbarium type specimens in IBK, there are 2 128 species of vascular plants among them, which belong to 619 genera and 170 familes (include subspecies, varieties and forms), the dominant families in the collection of type specimens include Lauraceae, Gesneriaceae, Rubiaceae, Theaceae, Orchidaceae, Urticaceae, Liliaceae, Actinidiaceae, Euphorbiaceae, Ebenaceae, Ericaceae, etc. the dominant genera include Begonia, Aspidistra, Aristolochia, Ardisia, Ilex etc; (2) The type specimens were collected from 20 provinces, autonomous regions, municipalities and special administrative regions of China and 2 other countries. More type specimens were collected from Guangxi (48.19%), Hainan (24.14%) and Guangdong (11.63%); (3) The type specimen collection reached the peak in the 1930s and 1950s, and the peak of type specimen naming was in the 1980s, which was related to the rise of plant taxonomy in China and the compilation and research of flora of China, the average shelf life for type specimens was 21 years, and the longest shelf time is 82 years. The collection and digitization of type specimens are also discussed and prospected..
Subjects: Biology >> Botany >> Applied botany submitted time 2022-04-29 Cooperative journals: 《广西植物》
Abstract： Guangxi Mulun National Nature Reserve is located in the crisscross zone of Dian-Qian-Gui flora and south China flora, also is the heartland of the transition zone about Palaeoarctic flora and Palaeotropical flora. It plays an irreplaceable role in biodiversity conservation areas of China. In order to understand the plant species diversity in Guangxi Mulun National Nature Reserve, the composition and characteristics of vascular plant diversity was studied based on historical literatures, field investigations, specimens collection and identification, and data statistical analysis. The results were as follows: (1) this Reserve had 1 735 species of vascular plants, including 218 species of Lycophytes and Ferns, 1 517 species of seed plants, with abundant vascular plant diversity and complex floristic composition. (2) this Reserve had 486 species endemic to China, 56 species endemic to Guangxi, and 262 species endemic to karst areas, with significant plant endemism. (3) this Reserve had 68 species of national key protected wild plants, 153 species of Guangxi key protected wild plants, 4 species of extremely small population wild plants in China, 108 threatened plants, and 144 plants listed in the appendix of the Convention on International Trade in Endangered Species of wild Fauna and Flora (CITES), with relative high degree of rare and endangered plants. Based on the results, Guangxi Mulun National Nature Reserve is an important gene bank of karst plants. It has extremely important conservation value. This study also provides important basic data for construction and management of this Reserve, protection and sustainable utilization of plants, and other scientific research works.
Subjects: Biology >> Botany >> Applied botany submitted time 2021-06-02 Cooperative journals: 《广西植物》
Abstract： Based on literature, field work, collection, examination and identification of related specimens, we found a newly recorded species of Phyllanthaceae from China——Sauropus racemosus Beille. It differs from other species of Sauropus in having glabrous young branches,glabrous leaves, racemoses 3 to 5 clustered on the lower part of the old stem branchlets. In this paper, a detailed description, the photographs and geographical distribution of S. racemosus are given. In addition, we consider S. racemosus as ‘Endangered’ (EN) based on the IUCN categories and criteria. The discovery of S. racemosus enriched the diversity of plant species in the Sino-Vietnanese border area. It reflects that the Sino-Vietnanese border area are biodiversity hotspots in the world and key areas for biodiversity conservation. It also shows that the plant investigation in this area is not enough, and further investigation and research are needed.
Subjects: Biology >> Botany >> Applied botany submitted time 2020-08-02 Cooperative journals: 《广西植物》
Abstract：半蒴苣苔（Hemiboea subcapitata）为苦苣苔科半蒴苣苔属多年生草本植物。该种形态变异幅度大，曾包括多个变种；分布范围广，在多种类型的生境基质上皆有分布。本研究包括典型半蒴苣苔和与之近缘，且曾被归为其变种的翅茎半蒴苣苔(H. pterocaulis)，以及我们新发现的与两者形态上分别最相近的另两种变异类型，对其关键形态、微形态的多样性进行了描述和比较；结合查阅标本、文献资料以及长期的野外追踪调查，统计分析了半蒴苣苔不同类型间的地理和生境分布；此外，通过DNA证据，初步重建各物种及变异类型间的系统发育和单倍型进化关系。研究结果表明：(1)通过茎、叶、花和开花物候等多性状组合能够区分半蒴苣苔复合群各类型。(2)半蒴苣苔复合群四类型间在叶表皮细胞形状和气孔分布等方面无甚区别；而在表皮毛的有无、复表皮层数、维管束数量和排布存上存在差别，或有助于分类。(3)典型半蒴苣苔广泛分布于我国中部至南部，向南延伸至越南北部，在石灰岩、丹霞等生境基质上皆有分布；翅茎半蒴苣苔仅分布于广西桂林市小部分区域的喀斯特山石灰岩基质上；而另两种变异类型则分布更为狭域，仅分布于桂林市永福县一个或相邻的数个喀斯特山石灰岩基质上。(4)DNA单倍型网络图分析表明，半蒴苣苔复合群四类型各自独享单倍型；但重建分子系统发育关系则表明，金钟山居群与翅茎半蒴苣苔聚为一支，两者亲缘关系最近但相互之间不成单系，金钟山居群是否为独立物种还需更多证据加以检验，而半蒴苣苔则与永福半蒴苣苔两者间互为单系，支持两者为独立物种。
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