Abstract Dioscorea is a highly diverse genus in Brazil, particularly the south-eastern region, and most especially in the Atlantic Forest. Recent phylogenetic studies have helped clarify the intricate subgeneric classification of the genus, although some species remain to be sampled, and further studies are necessary to ascertain their systematic placement in the genus. Here, a palynological description of nine species occurring in a patch of Atlantic Forest, in the State of São Paulo, is provided. Three of these have not yet been sampled in molecular studies. The pollen of D. tauriglossum had never been characterised before. Dioscorea pollen are spheroidal to ellipsoidal, small to medium in size (the larger dimensions in D. dodecaneura and the smaller in D. amaranthoides), with disulculate aperture. The pollen wall ornamentation contributed to the segregation of two species – psilate-perforate (D. altissima, syn. D. choncrocarpa) and rugulate-perforate (D. monadelpha), as well as the separation of the other seven species in two groups – microreticulate (D. dodecaneura, D. multiflora, D. tauriglossum), and striate (D. amaranthoides, D. laxiflora, D. olfersiana, D. trilinguis). Systematic implications of the palynological variation found are discussed under the light of recent molecular phylogenetic studies.

中文翻译：

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来自巴西东南部（圣保罗）大西洋森林的薯蓣（薯蓣科）的花粉形态对新热带物种的系统学有贡献

摘要薯蓣属是巴西的一个高度多样化的属，特别是在东南部地区，尤其是在大西洋森林中。最近的系统发育研究有助于澄清该属的复杂亚属分类，尽管仍有一些物种有待取样，并且需要进一步研究以确定它们在该属中的系统位置。此处提供了对圣保罗州大西洋森林中出现的九种物种的孢粉学描述。其中三个尚未在分子研究中取样。D. tauriglossum 的花粉以前从未被表征过。薯蓣花粉为球状至椭圆形，小至中等大小（D. dodecaneura 的尺寸较大，D. amaranthoides 的尺寸较小），具有裂隙孔。花粉壁纹饰促成了两种物种的分离 - psilate-perforate (D. altissima, syn. D. choncrocarpa) 和 rugulate-perforate (D. monadelpha)，以及将其他七个物种分为两组 -微网状（D. dodecaneura、D. multiflora、D. tauriglossum）和条纹（D. amaranthoides、D. laxiflora、D. olfersiana、D. trilinguis）。根据最近的分子系统发育研究讨论了发现的孢粉学变异的系统意义。