Inocybe humilis Esteve-Rav. & Vila, Revista Catalana de Micologia

Inocybe humilis (J. Favre & E. Horak) Esteve-Rav. & Vila, Revista Catalana de Micologia 21: 192 (1998). Figs. 4a, d

≡ Astrosporina humilis J. Favre & E. Horak in Horak, Arctic and Alpine Mycology 2: 231 (1987)

Misapplied: Inocybe humilis J. Favre, Ergebnisse des Wissenschaftlichen Untersuchungen des Schweizerischen Nationalparks 6: 480, 587 (1960) -inv. art. 40.1-

Studied material: holotype of I. humilis. Figs. 5a, b:— SWITZERLAND, God God vers 1800 m prés de S-chanf, Hte Engadine, sur la terre nue graveleuse d’un chemin, foret de mélèzes, d’épicéas, d’aroles (Pinus cembra), 5 September 1956, J. Favre, G00126386 (G!), Nº Collector: Z.S. 583. GenBank: ITS ON227435.

Basidiospores star-shaped (Inocybe asterospora -like), ochraceous, provided with numerous knobs (8–12), 1.2–2.5 µm high, subisodiametric, (9–)9.1– 9.9 –10.7(–11) × (7–)7– 7.5 –8(–8) µm. Q = (1.2–)1.2– 1.3 –1.4(–1.4) (12 spores). Basidia hyaline, claviform, 4-spored. Gill edge heterogeneous. Cheilocystidia (45–)45–50.3–55(–55) × (14–)14.7– 17.6–19.7(–20) µm (6 cystidia), abundant, hyaline or showing a golden intracellular pigment, crystalliferous at apex, mostly lageniform, sometimes shortly pedicellate, with pale yellow reaction to ammonia; paracystidia clavate, hyalin. Pleurocystidia numerous, similar to cheilocystidia, (44.1–)52.6– 67.9 –83.7(–94.8) × (13.7–)15.5– 17.7 –20.3(–22.2) µm, Q = (2.46–)2.96– 3.8 –5.22(–6.08) (6 cystidia), hyaline or showing a golden-brown intracellular pigment, thick-walled (2–3) µm. Trama of stipe quite yellow, just darkening to brownish yellow. Caulocystidia abundant, lageniform to subfusiform (31.5–)32.5– 52.2 –63(–65) × (13–)14.4– 18 –22.2(–23) µm. Q = (1.87–)1.95– 2.9 –3.9(–4.01) (11 cystidia), weakly crystalliferous, present from the apical part to the base of the stipe in tufts, where they appear mixed with cylindrical caulocystidiod hairs and with numerous hyaline clavate paracaulocystidia, thick-walled. Clamps present.

Additional collections examined of Inocybe humilis:— SPAIN, Girona, Ulldeter, Setcases (Ripolles), UTM 4384697, 2300 m asl., in Salix herbacea and S. retusa, 14 August 1997, J. Vila, AH 23498!, duplicate in JVG970814- 14, GenBank: ITS-LSU ON 259052; Madrid, Somosierra, Dehesa Boyal, under B. pendula, Corylus avellana, 13 July 1988, G. Moreno, F. Esteve-Raventós, AH 46520!; ibidem, under B. pendula, Q. petrea, S. atrocinerea, 1 September 2001, M. Villarreal, F. Esteve-Raventós, AH 26954!, GenBank: KJ938773 (as I. xanthomelas); ibidem, La Hiruela, under Betula pendula, 14 July 2002, J. C Campos, J. P. Campos, AH 29895!, GenBank: KJ938774 (as I. xanthomelas); ibidem, Rascafría, Arroyo de la Angostura, 40.835642, -3.897870, 1328 m, under Pinus sylvestris, Betula alba, Salix sp., 5 August 2007, F. Pancorbo, AH 56428!; ibidem, on the margin of a peat bog under B. alba, P. sylvestris, 27 June 2009, F. Pancorbo, AH 56429!; ibidem, 2 July 2011, F. Pancorbo, AH 45142!, GenBank: ITS-LSU ON 259050; ibidem, El Brezal, 40,858 859, -3,909738, 1236 m asl., on the margin of a peat bog under B. alba, P. sylvestris, 6 August 2011, F. Pancorbo, AH 56430!; ibidem, Arroyo de La Angostura, 40.83564298, -3.89787044, 1340 m asl., On the margin of a peat bog under B. alba, P. sylvestris, Salix sp., 23 June 2012, F. Pancorbo, AH 45147!; ibidem, 30 June 2012, F. Pancorbo, AH 45144!, GenBank: ITS-LSU ON 259051; ibidem, 7 July 2013, F. Pancorbo, AH 40430!, GenBank: KJ938775 (as I. xanthomelas); ibidem, 14 July 2013, F. Pancorbo, AH 56424!; ibidem, 14 July 2013, F. Pancorbo, AH 56425!; ibidem, 1 August 2013, F. Pancorbo, AH 56426!; ibidem, 3 July 2015, F. Pancorbo, AH 56427!; ibidem, 14 August 2015, F. Pancorbo, AH 47700!; ibidem, Arroyo Aguilón, 40.877638, -3.877161, 1180 m asl., on the margin of a brooklet in a Quercus pyrenaica forest, on acidic soil, 10 July 2017, F. Pancorbo, AH 56431!; ibidem, 26 September 2017, F. Pancorbo, AH 48192!, GenBank: ITS-LSU ON 259053; ibidem, Arroyo de La Angostura, 40.83611, -3.89667, 1337 m asl., on the margin of a peat bog under B. alba, P. sylvestris, 30 June 2018, F. Pancorbo, AH 48220!; ibidem, 24 June 2020, F. Pancorbo, AH 56356!; ibidem, 24 June 2020, F. Pancorbo, AH 56357!; ibidem, 3 August 2020, F. Pancorbo, AH 56364!, GenBank: ITS-LSU ON 263577; ibidem, 13 August 2020, F. Pancorbo, AH 56370!; ibidem, 10 July 2021, F. Pancorbo, AH 56417!; ibidem, 21 August 2021, F. Pancorbo, AH 56423!, GenBank: ITS ON 263163. SWEDEN, Västergötland, Alingsås, Nolhagaparken, under Fagus and Quercus, 15 August 2004 (GB!), GenBank AM882718; ibidem, under Fagus and Quercus, 8 September 2015, E. Larsson 143-15 (GB!); Jämtland, Bräcke, Bräcke kyrkogård, under Pinus sylvestris, 27 August 2018, E. Larsson 226-18 (GB!).