This article provides morphological descriptions and illustrations of microfungi associated with the invasive weed, Chromolaena odorata, which were mainly collected in northern Thailand. Seventy-seven taxa distributed in ten orders, 23 families (of which Neomassarinaceae is new), 12 new genera (Chromolaenicola, Chromolaenomyces, Longiappendispora, Pseudocapulatispora, Murichromolaenicola, Neoophiobolus, Paraleptospora, Pseudoroussoella, Pseudostaurosphaeria, Pseudothyridariella, Setoarthopyrenia, Xenoroussoella), 47 new species (Aplosporella chromolaenae, Arthrinium chromolaenae, Chromolaenicola chiangraiensis, C. lampangensis, C. nanensis, C. thailandensis, Chromolaenomyces appendiculatus, Diaporthe chromolaenae, Didymella chromolaenae, Dyfrolomyces chromolaenae, Leptospora chromolaenae, L. phraeana, Longiappendispora chromolaenae, Memnoniella chromolaenae, Montagnula chiangraiensis, M. chromolaenae, M. chromolaenicola, M. thailandica, Murichromolaenicola chiangraiensis, M. chromolaenae, Muyocopron chromolaenae, M. chromolaenicola, Neomassarina chromolaenae, Neoophiobolus chromolaenae, Neopyrenochaeta chiangraiensis, N. chromolaenae, N. thailandica, N. triseptatispora, Nigrograna chromolaenae, Nothophoma chromolaenae, Paraleptospora chromolaenae, P. chromolaenicola, Patellaria chromolaenae, Pseudocapulatispora longiappendiculata, Pseudoroussoella chromolaenae, Pseudostaurosphaeria chromolaenae, P. chromolaenicola, Pseudothyridariella chromolaenae, Pyrenochaetopsis chromolaenae, Rhytidhysteron chromolaenae, Setoarthopyrenia chromolaenae, Sphaeropsis chromolaenicola, Tremateia chiangraiensis, T. chromolaenae, T. thailandensis, Xenoroussoella triseptata, Yunnanensis chromolaenae), 12 new host records, three new taxonomic combinations (Chromolaenicola siamensis, Pseudoroussoella elaeicola, Pseudothyridariella mahakashae), and two reference specimens (Torula chromolaenae, T. fici) are described and illustrated. Unlike some other hosts, e.g. bamboo (Poaceae) and Pandanaceae, the dominant group of fungi on Siam weed were Dothideomycetes. Only 15 species previously recorded from northern Thailand were found in this study. Most of the taxa are likely to have jumped hosts from surrounding plants and are unlikely to be a specialist to Siam weed. Most fungal families found on Siam weed had divergence estimates with stem ages in the Cretaceous, which coincided with the expected origin of the host family (Asteraceae). This further indicates that the species have jumped hosts, as it is unlikely that the taxa on the alien Siam weed came from the Americas with its host. They may, however, have jumped from other Asteraceae hosts. In a preliminary screening 40 (65%) of the 62 species tested showed antimicrobial activity and thus, the fungi associated with C. odorata may be promising sources of novel bioactive compound discovery. We provide a checklist of fungi associated with C. odorata based on the USDA Systematic Mycology and Microbiology Laboratory (SMML) database, relevant literature and our study. In total, 130 taxa (116 identified and 14 unidentified species) are distributed in 20 orders, 48 families, and 85 genera. Pseudocercospora is the most commonly encountered genus on Siam weed.

中文翻译：

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对与入侵杂草Chromolaena odorata（暹罗杂草）相关的真菌的分类学和系统发育贡献

本文提供了与入侵杂草Chromolaena odorata相关的微真菌的形态学描述和插图，这些真菌主要收集于泰国北部。七七类群分布在10个数量，23个家庭（其中Neomassarinaceae是新的），12个新属（Chromolaenicola，Chromolaenomyces，Longiappendispora，Pseudocapulatispora，Murichromolaenicola，Neoophiobolus，Paraleptospora，Pseudoroussoella，Pseudostaurosphaeria，Pseudothyridariella，Setoarthopyrenia，Xenoroussoella），47新种（Aplosporella chromolaenae，节菱chromolaenae，Chromolaenicola chiangraiensis，C. lampangensis，C. nanensis，C. thailandensis，Chromolaenomyces appendiculatus，Diaporthe chromolaenae，蔓chromolaenae，Dyfrolomyces chromolaenae，Leptospora chromolaenae，L. phraeana，Longiappendispora chromolaenae，Memnoniella chromolaenae，Montagnula chiangraiensis，M. chromolaenae，M. chromolaenicola，M. thailandica，Murichromolaenicola chiangraiensis，M. chromolaenae，Muyocopron chromolaenae，M. chromolaenicola，Neomassarina chromolaenae，Neoophiobolus chromolaenae，Neopyrenochaeta chiangraiensis，N. chromolaenae，N. thailandica，N. triseptatispora，Nigrograna chromolaenae，Nothophoma chromolaenae，Paraleptospora chromolaenae，P蓝绿假单胞菌，彩色，蝶，长假cap，Pseudoroussoella chromolaenae，Pseudostaurosphaeria chromolaenae，P. chromolaenicola，Pseudothyridariella chromolaenae，Pyrenochaetopsis chromolaenae，Rhytidhysteron chromolaenae，Setoarthopyrenia chromolaenae，枯chromolaenicola，Tremateia chiangraiensis，T. chromolaenae，T. thailandensis，Xenoroussoella triseptata，云南chromolaenae），12条新的主机记录，三新分类分类组合（Chromolaenicola siamensis，Pseudoroussoella elaeicola，Pseudothyridariella mahakashae）和两个参考标本（Torula chromolaenae，T. fici进行了说明和说明。与其他一些寄主（例如竹子（禾本科）和露兜树科）不同，暹罗杂草上的优势真菌是十二碳菌。这项研究仅发现了先前从泰国北部记录的15种物种。大多数分类单元可能从周围的植物中跳出寄主，因此不太可能成为暹罗杂草的专家。在暹罗杂草上发现的大多数真菌家族对白垩纪的茎龄有不同的估计，这与寄主家族（菊科）的预期起源相吻合。这进一步表明该物种已跃迁为寄主，因为外来暹罗杂草的类群不太可能来自拥有寄主的美洲。但是，它们可能已从其他菊科寄主跳下。在初步筛选中，测试的62种细菌中有40种（65％）显示出抗菌活性，因此，C. odorata可能是新的生物活性化合物发现的有希望的来源。我们根据美国农业部系统真菌学和微生物学实验室（SMML）数据库，相关文献以及我们的研究结果，提供了与臭C相关真菌的清单。总共以20个目，48个科和85个属分布了130个分类单元（116个已识别物种和14个未识别物种）。假尾孢是暹罗杂草上最常见的属。