Drosera L. (Droseraceae) is a genus of insectivorous plants distributed worldwide with 240 species, 40 of which are found in South America. In the temperate forests of Chile and Argentina the only species present is D. uniflora. In a peat bog in Nahuel Huapi National Park, Argentina, a new species of Drosera was found in February 2018. To identify the species, we used morphological characters, and in addition, we sequenced two individuals for the nuclear region ITS and the chloroplast gene rbcL. Other Drosera sequences for these molecular regions were downloaded from GenBank, and a phylogenetic analysis was done to confirm the morphological identification of the Patagonian individuals. Morphologically and genetically, the species found in Nahuel Huapi is D. rotundifolia, a mostly Northern Hemisphere species. This is an alien species to the region and is thought to have been transported to the bog by tourists that visit the area. The presence of an exotic species represents a threat to this particular ecosystem with high conservation value. Currently, the National Park is taking control actions order to remove all individuals of the recently detected species. This study represents the first report of an alien species of Drosera in southern South America growing in the wild. This potentially invasive species may not only have negative impacts on the natural peat bog habitats in southern Argentina and Chile, but may also reach bogs in other temperate parts of the world.

中文翻译：

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高保护价值的巴塔哥尼亚泥炭沼泽中外来小球藻的首次报道

Drosera L.（Droseraceae）是食虫植物的一种，分布在世界各地，共有240种，其中40种在南美发现。在智利和阿根廷的温带森林中，唯一存在的物种是 杜鹃花。在阿根廷纳韦尔瓦皮国家公园的一个泥炭沼泽中，于2018年2月发现了一种新的茅膏菜属植物。为鉴定该种，我们使用了形态特征，此外，我们对ITS区域和叶绿体基因的两个个体进行了测序rbcL。其他Drosera从GenBank下载了这些分子区域的序列，并进行了系统发育分析，以确认巴塔哥尼亚人的形态学鉴定。从形态和遗传上讲，在纳韦尔·华皮发现的物种是D. rotundifolia，主要是北半球物种。这是该地区的外来物种，被认为已被该地区的游客运输到沼泽中。外来物种的存在对这一具有高保护价值的特定生态系统构成了威胁。目前，国家公园正在采取控制行动，以清除所有最近发现的物种。这项研究代表了Drosera外来物种的首次报告在南美南部野外生长。这种潜在的入侵物种不仅会对阿根廷南部和智利的天然泥炭沼泽生境产生负面影响，而且还可能扩散到世界其他温带地区的沼泽。