Published: Syll. Fung. 5: 796 (1887)
Taxonomic status: This is a Inocybe.
Notes: Current name is Inocybe fuscodisca (Peck) Massee, Ann. Bot., Lond. 18: 487 (1904)
Basionym: Agaricus fuscodiscus Peck [as "Agaricus (Hebeloma) fuscodiscus"] (1875)
Types: UNITED STATES: New York: Sullivan County, Forestburgh (approx. 41.5733°N, 74.7257°W, alt. approx. 400 m a.s.l.) on soil in woodland pastureland, Sep. 1873, C.H. Peck (Holotype. herbarium acc. no. NYS-F-001306, HJB1000267).
Diagnosis: Pileus at first subviscid, conical, covered with blackish-brown fibrils, then campanulate or expanded, umbonate, whitish, the disk remaining blackish-brown; lamellae close, whitish then brownish, minutely rough on the edge: stem equal, solid, whitish and pruinose at the top, elsewhere brownish, fibrillose; spores .00035' long, 00018' broad. Plant 1'-3' high, pileus 6"-12" broad, stem 1"-2" thick. In an old pasture under trees. Forestbnrgh. Sept. (Plate 1, figs. 3-6.) The somewhat viscid pellicle is separable. The odor resembles that of chestnut blossoms.
Commentary: This species was originally described by Peck (1875) as Agaricus (Hebeloma) fuscodiscus and recombined by Saccardo (1887) as Hebeloma fuscodiscum and by Massee (1904) as Inocybe fuscodisca. The spores are smooth walled, on average 9 × 5.3 μm, the cheilocystidia and pleurocystidia are ventricose with crystals at the apex, thus supporting the recombination into Inocybe. The recombination in 1702 Inocybe has been taken up in the North American literature since 1938 (see e.g. Smith and Hesler 1938; Grund and Stuntz 1970; Champignons du Québec: Inocybe fuscodisca (mycoquebec.org), accessed 28 Oct. 2021). Smith (1939) concluded, as did recently Matheny and Swenie (2018), that the taxon requires further study.
All current species: aanenii | adherens | aestivale | albidulum | alboerumpens | albomarginatum | album | alpinicola | alpinum | ambustiterranum | aminophilum | ammophilum | angelesiense | angustilamellatum | anthracophilum | arcticum | asperosporum | aurantioumbrinum | australe | avellaneum | bellotianum | birrus | bulbiferum | catalaunicum | caulocystidiosum | cavipes | celatum | cinnamomeum | circinans | cistophilum | citrisporum | cohaerens | colvinii | crustuliniforme | cylindrosporum | danicum | discomorbidum | duracinoides | eburneum | echinosporum | erebium | erumpens | excedens | flavidifolium | fuscatum | fusisporum | geminatum | grandisporum | griseopruinatum | harperi | helodes | hiemale | ifeleletorum | immutabile | incarnatulum | indicum | ingratum | ischnostylum | islandicum | kelloggense | lactariolens | laetitiae | laterinum | leucosarx | limbatum | lindae | louiseae | luchuense | luteicystidiatum | lutense | mackinawense | magnicystidiatum | marginatulum | matritense | mediorufum | melleum | mesophaeum | minus | monticola | nanum | nauseosum | naviculosporum | neurophyllum | nigellum | nitidum | nothofagetorum | odoratissimum | olympianum | pallidolabiatum | paludicola | parcivelum | parvicystidiatum | parvisporum | pascuense | perexiguum | plesiocistum | populinum | porphyrosporum | praeolidum | psammophilum | pseudoamarescens | pseudofragilipes | pubescens | pumilum | pungens | pusillum | quercetorum | radicans | radicosoides | radicosum | rostratum | sacchariolens | sagarae | salicicola | sarcophyllum | serratum | sinapizans | sordescens | sordidulum | spetsbergense | sporadicum | subaustrale | subconcolor | subfastibile | subtortum | syrjense | theobrominum | vaccinum | velatum | velutipes | vesterholtii | victoriense | vinosophyllum | viscidissimum | youngii
All related names: aberrans | aeruginosum | affine | agglutinatum | aggregatum | alabamense | alachuanum | albiceps | albidocortinatum | albidocortinatus | albipes | albocolossum | albocrenulatum | albocrenulatus | alvarense | amarellum | angustifolium | angustifolius | angustilamellata | angustispermum | angustisporium | apolectum | apolectus | appendiculatum | aprile | arenicolor | arenosum | argentinum | ascophorus | asperulatum | atrifulvifolium | atrobrunneum | atrosanguineum | augusti | aurantiellum | austroamericanum | bakeri | barrowsii | bellotianus | bicoloratum | bingolense | birra | boulderense | broadwayi | bruchetii | brunneifolium | brunneodiscum | brunneomaculatum | bryogenes | bubalinum | bulbaceum | bulbosum | busporus | caespitosum | californicum | calvinii | calyptrosporum | canariense | candidipes | capniocephalum | capniocephalus | catervarium | catervarius | cerussatum | ceskae | chapmaniae | chlorophyllum | cinchonense | cinereostipes | cinereum | claviceps | clavuligera | clavuligerum | clavulipes | clavus | coarctatum | coarctatus | collariatum | colossus | commune | communis | coniferarum | coprophilum | corrugatum | cortinarioides | crassicystidiatum | crassipes | crassum | crassus | cremeopallidum | cremeum | crustuliniformis | cubense | dasypus | decoratus | deflectens | denigricans | diffracta | diffractum | diffractus | discomorbida | discomorbidus | dissiliens | domardiana | domardianum | dryophilum | dunense | earlei | edule | edulis | edurum | elata | elatellum | elatellus | elatum | elatus | ellipsoideosporium | erebia | erysibodes | evensoniae | exalbidum | exalbidus | exiguifolium | fagicola | fallax | farinaceum | fastibile | fastibilis | favrei | felipponei | felleum | fimbriatus | fimicola | firma | firmum | firmus | flaccidum | flammuloides | flavescens | flavidifolia | flavum | flexuosipes | floridanum | foedatum | fragilior | fragilipes | fragilius | fragrans | fragrantissimum | frenchii | funariophilum | fuscodiscum | fuscodiscus | fuscostipes | fusiformiradicatum | fusiformiradicatus | fusipes | gigaspermum | gigaspora | gigasporum | gigasporus | glabrescens | glutinosa | glutinosum | glutinosus | gomezii | gracile | gregariiforme | gregarium | griseocanescens | griseocanum | griseoscabrosum | griseoscabrosus | griseovelatum | griseum | griseus | groegeri | helvolescens | hemisphaericum | herrmanniae | hesleri | hetieri | holophaea | hormanii | hortense | horticola | hudsoniatum | huijsmaniana | humile | humosum | hydrocybeoides | hygrophilum | idahoense | igneum | ignobile | ignobilis | illicitum | illicitus | imbecillis | incognitum | indecisum | indica | infidum | infidus | insigne | ischnostylus | juneauense | kalmicola | kammala | kanouseae | kauffmanii | kemptoniae | khogianum | kirtonii | kuehneri | lacteocoffeatum | laevatum | laevatus | lamelliconfertum | latericolor | laterinus | lateritium | latifolium | latisporum | laursenii | levisporum | levyanum | lignicolum | limacinum | lindrothii | litoreum | littenii | longicauda | longicaudum | longicaudus | longisporum | lubriciceps | lucidum | lugens | lundqvistii | luteobrunneum | lutescentipes | luteum | macrosporum | maderaspatana | magnimamma | majale | malenconii | mammillatum | mammosum | maritinum | medianum | medianus | mediterranea | mediterraneum | megacarpum | mentiens | mesophaea | mesophaeus | micropyramis | microspora | microsporum | milleri | miserum | mitrata | mitratum | mitratus | montanum | montanus | moseri | mussiva | mussivum | mussivus | mutatum | mutatus | naucorioides | naufragum | naufragus | nauseosus | neerlandica | nigricans | nigromaculatum | nudipes | oblongisporum | obscurum | occidentale | ochraceum | ochroalbidum | octavii | oculatum | odini | odoratissimus | odoratum | olidum | olidus | ollaliense | oregonense | oreophilum | ossa | pallescens | pallida | pallidifolium | pallidoargillaceum | pallidoluctuosum | pallidomarginatum | pallidomarginatus | pallidum | palustre | pamphiliense | parvifructum | parvifructus | patriciae | peckii | perangustisporium | perfarinaceum | perigoense | permollis | perpallidum | perplexum | petiginosum | petiginosus | petrakii | piceicola | pinetorum | pitkinense | platense | polare | politum | porcatosporum | praecaespitosum | praecox | praefarinaceum | praefelleum | praefinitum | praefinitus | praelatifolium | praeviscidum | proletaria | proximum | psammicola | psamminum | psamminus | pseudofastibile | pseudomesophaeum | pseudopunctatum | pseudostrophosum | pudica | pumiloides | punctata | punctatiforme | punctatum | punctatus | pyrophilum | pyrrholepidum | pyrrholepis | queletii | radicatum | radicatus | radicosa | radicosus | remyi | repandum | repandus | riparium | rivulosum | robustum | ruber | rubrofuscum | rubrum | rufosporum | salmonense | sambucinum | sambucinus | sanjuanense | sarcophyllus | scabella | scabellum | senatum | senescens | sericipes | siegelii | siennaecolor | simile | sinapiolens | sinuosa | sinuosum | sinuosus | smithii | sociale | solheimii | sordidulus | sordidum | splendens | spoliatum | spoliatus | squamulosum | stanleyense | stellatosporum | stellatosporus | stenocystis | sterile | sterilis | sterlingii | strophosum | strophosus | suaveolens | subannulatum | subargillaceum | subboreale | subcaespitosum | subcapitatum | subcollariatum | subcollariatus | subfastigiatum | subhepaticum | subincarnatum | sublamellatum | submelinoides | subochracea | subochraceum | subochraceus | subplatense | subrimosum | subrubescens | subsacchariolens | subsaponaceum | subsaponaceus | subscambum | subscambus | substrophosum | subtestaceum | subtestaceus | subumbrinum | subvatricosoides | subvictoriense | subviolaceum | subzonatum | subzonatus | sulcatum | sulcatus | syrjensis | sztoczekii | tenuifolium | termitaria | testacea | testaceum | testaceus | texanum | thomasianum | thomasianus | tomentosum | tomoeae | tortuosum | tortuosus | tottenii | trachysporum | trinidadense | truncatum | truncatus | tumidulum | tumidulus | umbellatum | urbanicola | utahense | vatricosa | vatricosoides | vatricosum | vatricosus | vejlense | velenovskyi | venifer | veniferum | vernale | verrucispora | verruculosum | versipelle | versipellis | victoriae | vinaceogriseum | vinaceoumbrinum | violascens | virgatum | viscidissima | viscidissimus | weberi | wells-kemptoniae | wellsiae | westraliense | xerophilum | zsigmondyi