Phylogenetic and morphological analyses have been conducted on powdery mildew specimens on different Berberis and Mahonia spp. from Asia, Europe and North America. The present study showed that collections of Erysiphe berberidis exhibit a high degree of morphological plasticity of the sexual morph, in contrast to their morphologically, rather uniform, asexual morph. In phylogenetic tree, all sequences cluster in a large strongly supported clade, without any indication and support for further differentiation into cryptic species. There are three morphological types within E. berberidis s. lat. that contain consistent differences. Until future multi-locus analyses will be available, we prefer to treat these 'morphological types' as varieties. These include Erysiphe berberidis var. berberidis, E. berberidis var. asiatica, and E. berberidis var. dimorpha comb. nov. (≡ Microsphaera berberidis var. dimorpha, M. berberidicola, and M. multappendicis). To fix the application of species name E. berberidis, an appropriate epitype was designated, with an ITS sequences.

中文翻译：

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重访 Erysiphe berberidis (s. lat.) 的系统发育和分类学。

系统发育和形态学分析已经对不同小檗属和大功利属的白粉病标本进行了分析。来自亚洲、欧洲和北美。本研究表明，与它们在形态上相当统一的无性形态形成对比的是，小檗白粉病的集合表现出高度的有性形态可塑性。在系统发育树中，所有序列都聚集在一个大的强烈支持的进化枝中，没有任何迹象和支持进一步分化为隐秘物种。E. berberidis s 共有三种形态类型。纬度。包含一致的差异。在未来的多位点分析可用之前，我们更愿意将这些“形态类型”视为变体。这些包括 Erysiphe berberidis 变种。berberidis, E. berberidis 变种。asiatica 和 E. 小檗 双形梳 十一月 （≡ Microsphaera berberidis var. dimorpha、M. berberidicola 和 M. multappendicis）。为了修复物种名称 E. berberidis 的应用，指定了一个适当的表型，带有 ITS 序列。