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Clarifying the Dioscoreabuchananii Benth. species complex: a new potentially extinct subspecies for South Africa

机译:澄清薯osBuchananii Benth。物种复合体:南非一个新的可能灭绝的亚种

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摘要

The Dioscorea buchananii complex is shown to comprise three species, one of which is divided into two subspecies, based on morphological data. Two species, Dioscorea rupicola Kunth and Dioscorea multiloba Kunth, are endemic or subendemic to South Africa and of widespread occurrence in KwaZulu Natal. They differ markedly from each other in inflorescence and floral morphology and appear to be ecologically differentiated. The third species, Dioscorea buchananii Benth., is primarily found in southeastern tropical Africa, but a small number of specimens collected in South Africa in the late 19th and early 20th centuries are placed in an endemic subspecies, Dioscorea buchananii subsp. undatiloba (Baker) Wilkin. The latter taxon is a high priority in terms of rediscovery and conservation. Keys, descriptions, supporting information and illustrations are provided and made available online through eMonocot biodiversity informatics tools. Three nomenclatural acts are undertaken: two names are placed in synonymy and a new combination made.
机译:根据形态学数据,布氏薯complex(Dioscorea buchananii)复合物包含三种,其中一种被分为两个亚种。南非薯Di(Dioscorea rupicola Kunth)和薯os(Dioscorea multiloba Kunth)是南非的特有种或亚特有种,并广泛存在于夸祖鲁纳塔尔。它们在花序和花序形态上明显不同,并且似乎在生态上有所区别。第三个物种Dioscorea buchananii Benth。主要发现于热带东南非洲,但在19世纪末和20世纪初在南非收集到少量标本。几个世纪以来,它们被归入特有的亚种, Dioscorea buchananii subsp。不满 (贝克)威尔金。在重新发现和保护方面,后一个分类单元是高度优先的。通过eMonocot生物多样性信息工具提供了键,描述,支持信息和插图,并使其在线可用。进行了三种命名法:将两个名称作为同义词,并进行了新的组合。

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