The sexual morph of <i>Hohenbuehelia subreniformis</i> ( <i>Pleurotaceae</i> ) discovered in Finland

A fresh collection of a <i>Hohenbuehelia</i> from Turku, Finland was determined through phylogenetic analyses of sequences of the nuclear ribosomal internal transcribed spacer (ITS) region, large ribosomal subunit (nLSU), translation elongation factor 1-alpha (<i>TEF-1α</i>), and RNA polymerase II second largest subunit (<i>RPB2</i>) genes to be conspecific with ex-type cultures of <i>Hohenbuehelia subreniformis</i>, originally described from Ontario, Canada. No sexual morph was known; it is a member of the broad <i>H. atrocoerulea</i> clade. We provide a detailed description of the macro- and micromorphology of this species, which resembles pale forms of <i>H. grisea</i> but differs in having a more spathulate pileus and broader spores. Of the fifteen valid species formerly classified in the anamorph genus <i>Nematoctonus</i>, all but three are now linked to conspecific or closely related sexual morphs in <i>Hohenbuehelia</i>. <b>Citation:</b> Thorn RG, Consiglio G, Setti L, Kekki T, Daigneault BC, O'Nille EST (2025). The sexual morph of <i>Hohenbuehelia subreniformis</i> (<i>Pleurotaceae</i>) discovered in Finland. <i>Fungal Systematics and Evolution</i> <b>16</b>: 307-316. doi: 10.3114/fuse.2025.16.17.