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In the present study, we report two new asexual fungal species (i.e., <i>Discosia rhododendricola</i>, <i>Neopestalotiopsis rhododendricola</i> (<i>Sporocadaceae</i>) and a new host for a previously described species (i.e., <i>Diaporthe nobilis</i>; <i>Diaporthaceae</i>). All species were isolated from <i>Rhododendron</i> spp. in Kunming, Yunnan Province, China. All taxa are described based on morphology, and phylogenetic relationships were inferred using a multigenic approach (LSU, ITS, <i>RPB2</i>, <i>TEF1</i> and <i>TUB2</i>). The phylogenetic analyses indicated that <i>D. rhododendronicola</i> sp. nov. is phylogenetically related to <i>D. muscicola</i>, and <i>N. rhododendricola</i> sp. nov is related to <i>N. sonnaratae</i>. <i>Diaporthe nobilis</i> is reported herein as a new host record from <i>Rhododendron</i> sp. for China, and its phylogeny is depicted based on ITS, <i>TEF1</i> and <i>TUB2</i> sequence data.