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首页> 外文期刊>Revista Brasileira de Biociências = >O gênro Stelis Sw. (Orchidaceae) no Rio Grande do Sul, Brasil
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O gênro Stelis Sw. (Orchidaceae) no Rio Grande do Sul, Brasil

机译：巴西南里奥格兰德州的Stelis Sw。（Orchidaceae）属

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摘要

Th genus Stelis Sw. comprises approximately 700 species occurring in rainforests of the Neotropics. Most species are epiphytic, with a caespitose habit, racemo inflorescence and small flowers with a triangular outline. The southern limit of the geographic distribution lies around 30oS latitude in South Brazil. The objective of this study was to carry out a taxonomic study of the native species of Stelis in Rio Grande do Sul. Our study was based on botanical material deposited in regional herbaria, the citations of taxa in the scientific literature, and some field trips to collect new material. Based on morphological characters we presented an identification key for the species, and performed botanical descriptions and diagnostic illustrations of the indigenous species. We also compiled information on the geographical distribution, occurrence in different forest types and the flowering and fruiting seasons. Seven species of Stelis were confirmed for the State: S. aprica Lindl., S. deregularis Barb.Rodr., S. fraterna Lindl., S. intermedia Poepp. & Endl., S. megantha Barb.Rodr., S. papaquerensis Rchb.f. and S. pauciflora Lindl. Another set of seven species was excluded as former misidentifications, uncertain names or new generic circumscriptions. Most species of Stelis in Rio Grande do Sul are strongly associated to the southern limit of the Brazilian Atlantic Forest, and so they are more commonly found or even restricted to the northeast part of the State.
机译：Stelis属包括大约700种新热带雨林中的物种。多数物种是附生的，具caespitose习性，总状花序和三角形轮廓的小花。地理分布的南部界限位于巴西南部，纬度约为30oS。这项研究的目的是对南里奥格兰德州的Stelis本地物种进行分类研究。我们的研究基于沉积在区域性草丛中的植物材料，科学文献中对分类单元的引用以及一些收集新材料的实地考察。基于形态特征，我们提供了该物种的识别码，并对本地物种进行了植物学描述和诊断。我们还汇编了有关地理分布，不同森林类型的发生以及开花和结果季节的信息。该州已确认7种Stelis物种：S。aprica Lindl。，S。deregularis Barb.Rodr。，S。fraterna Lindl。，S。intermedia Poepp。 ＆Endl。，S. megantha Barb.Rodr。，S. papaquerensis Rchb.f.和S. pauciflora Lindl。由于以前的错误标识，不确定的名称或新的通用限制，将另外七个物种排除在外。南里奥格兰德州的大部分史特利斯物种都与巴西大西洋森林的南部界限密切相关，因此更常见于该州的东北部，甚至仅限于该州的东北部。

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