Inosperma is a genus of gilled mushroom in the family Inocybaceae. Previously defined as a subgenus within the large genus Inocybe by Robert Kühner in 1980, these fungi were found to be more distantly related in a 2019 multigene phylogenetic study by Matheny and colleagues.
This group of mushrooms was distinguished morphologically from other Inocybes by the absence of pleurocystidia and the shape of the spores. Also the stem is usually longer than the cap is wide and the cheilocystidia consist each of a single cell and are often so numerous that they make the gill edge white.
Inosperma is divided into two sections: Cervicolores (with a scaly cap) and Rimosae (with a radially fibrose or radially cracking ("rimose") cap). The former includes I. bongardii and I. calamistratum whilst the latter takes in I. cookei, I. erubescens, I. maculatum and I. rimosum.
, Index Fungorum lists the following species in Inosperma:
| Image | Name | Taxon Author | Year | |
|---|---|---|---|---|
| Inosperma acutofulvum | (Bizio & Castellan) Bizio, A. Castellan & Cervini | 2020 | ||
| Inosperma adaequatum | (Britzelm.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma africanum | Aïgnon, Yorou & Ryberg | 2021 | ||
| Inosperma afromelliolens | Eyssart. & Buyck | 2021 | ||
| Inosperma akirnum | (K.P.D. Latha & Manim.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma apiosmotum | (Grund & D.E. Stuntz) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma armoricanum | (R. Heim) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma aureostipes | (Kobayasi) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma bicoloratum | (E. Horak, Matheny & Desjardin) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma boeticum | Eyssart. & Buyck | 2021 | ||
| Inosperma bongardii | (Weinm.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma bulbomarginatum | Aïgnon, Yorou & Ryberg | 2021 | ||
| Inosperma calamistratoides | (E. Horak) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma calamistratum | (Fr.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma carnosibulbosum | (C.K. Pradeep & Matheny) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma cervicolor | (Pers.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma changbaiense | (T. Bau & Y.G. Fan) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma chlorochroum | (Corriol & Guinb.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma cookei | (Bres.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma cyanotrichium | (Matheny, Bougher & G.M. Gates) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma dodonae | Bandini & B. Oertel | 2021 | ||
| Inosperma erubescens | (A. Blytt) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma fastigiellum | (G.F. Atk.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma flavobrunneum | Aïgnon, Yorou & Ryberg | 2021 | ||
| Inosperma fulvoumbrinum | (Bres.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma fulvum | (Bon) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma fuscospinulosum | (Corner & E. Horak) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma geraniodorum | (J. Favre) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma gregarium | (K.P.D. Latha & Manim.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma griseolum | (Takah. Kobay.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma hainanense | Y.G. Fan, L.S. Deng, W.J. Yu & N.K. Zeng | 2021 | ||
| Inosperma hirsutum | (Lasch) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma insignissimum | (Romagn.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma ionides | (Corner & E. Horak) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma ismeneanum | Bandini & B. Oertel | 2021 | ||
| Inosperma kuthanii | (Stangl & J. Veselský) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma lanatodiscum | (Kauffman) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma latericium | (E. Horak) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma lilofastigiatum | (Stangl & J. Veselský) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma maculatum | (Boud.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma maximum | (A.H. Sm.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma misakaense | (Matheny & Watling) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma monastichum | Bandini & B. Oertel | 2021 | ||
| Inosperma mucidiolens | (Grund & D.E. Stuntz) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma muscarium | Y.G. Fan, L.S. Deng, W.J. Yu & N.K. Zeng | 2021 | ||
| Inosperma mutatum | (Peck) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma neobrunnescens | (Grund & D.E. Stuntz) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma pallidifolium | (Murrill) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma pisciodorum | (Donadini & Riousset) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma proximum | (E. Horak, Matheny & Desjardin) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma quercinum | (Hongo) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma quietiodor | (Bon) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma reisneri | (Velen.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma rhodiolum | (Bres.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma rimosoides | (Peck) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma rosellicaulare | (Grund & D.E. Stuntz) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma rubricosum | (Matheny & Bougher) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma saragum | (K.P.D. Latha & Manim.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma shawarense | (Naseer & Khalid) Aïgnon & Naseer | 2021 | ||
| Inosperma subhirsutum | (Kühner) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma submaculatum | Eyssart. & Buyck | 2021 | ||
| Inosperma subrubescens | (G.F. Atk.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma subsphaerosporum | Y.G. Fan, L.S. Deng, W.J. Yu & L.Y. Liu | 2021 | ||
| Inosperma sulcatum | (Moënne-Locc., Poirier & Reumaux) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma tenerrimum | (G.F. Atk.) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma umbrinovirens | (E. Horak) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma veliferum | (Kühner) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma vinaceobrunneum | (Matheny, Ovrebo & Kudzma) Haelew. | 2020 | ||
| Inosperma vinaceum | Cervini, M. Carbone & Bizio | 2021 | ||
| Inosperma viridipes | (Matheny, Bougher & G.M. Gates) Matheny & Esteve-Rav. | 2019 | ||
| Inosperma virosum | (K.B. Vrinda, C.K. Pradeep, A.V. Joseph & T.K. Abraham ex C.K. Pradeep, K.B. Vrinda & Matheny) Matheny & Esteve-Rav. | 2019 |