Cortinarius coalescens Kärcher & Seibt is a rare European species of the subgenus Phlegmacium, section Phlegmacioides, neglected in recent molecular studies. New primers (CortF and CortR) designed for species in the section Phlegmacioides allowed to obtain ITS rDNA sequence data from the holotype collection of C. coalescens; according to the results, this epithet has priority over C. crassorum Rob. Henry ex Rob. Henry, C. pardinus Reumaux, and C. parargutus Bidaud, Moënne-Locc. & Reumaux. Morphological and ecological observations on recent collections of C. coalescens from the Czech Republic in comparison with the co-occurring C. largus are discussed. Nomenclatural and taxonomic comments on C. tomentosus Rob. Henry, C. balteatotomentosus Rob. Henry, and C. subtomentosus Reumaux are also provided. So far, C. coalescens is known with certainty from Germany, France, and the Czech Republic, where it grows in deciduous forests on acid to neutral soils. Arsenic and its compounds were determined in C. coalescens and related species of the section Phlegmacioides: C. largus, C. pseudodaulnoyae, and C. variecolor. Total arsenic concentrations were in the range 3.6–30.2 mg kg⁻¹ (dry matter) and arsenobetaine was the major arsenic compound.

中文翻译：

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Cortinarius coalescens 的复活：分类学、化学和生态学。

Cortinarius coalescens Kärcher & Seibt 是一种罕见的欧洲物种，属于Phlegmacium 亚属，Phlegmacioides部分，在最近的分子研究中被忽视。为 Phlegmacioides 部分中的物种设计的新引物（CortF 和 CortR）允许从C. coalescens的正型收集中获得 ITS rDNA 序列数据；根据结果​​，这个加词优先于C. crassorum Rob。亨利前罗布。Henry, C. pardinus Reumaux 和C. parargutus Bidaud, Moënne-Locc。＆Reumaux。最近收集的C. coalescens的形态学和生态学观察来自捷克共和国的 C. largus 与同时出现的C. largus进行了比较。C. tomentosus Rob的命名和分类评论。亨利，C. balteatomentosus Rob。还提供了Henry 和C. subtomentosus Reumaux。到目前为止，C. coalescens在德国、法国和捷克共和国肯定是已知的，它生长在酸性至中性土壤的落叶林中。在C. coalescens和Phlegmacioides部分的相关物种中测定了砷及其化合物：C . largus、C. pseudodaulnoyae和C. variecolor. 总砷浓度在 3.6-30.2 mg kg ^-1（干物质）范围内，砷甜菜碱是主要的砷化合物。