Inocybe subrimosa (P. Karst.) Sacc., Sylloge Fungorum 9: 100 (1891). Figs. 4c, f

≡ Clypeus subrimosus P. Karst., Meddelanden af Societas pro Fauna et Flora Fennica 16: 38 (1888)

Studied material: lectotype of I. subrimosa (as Clypeus subrimosus) invalidly designated by S. Huhtinen & J. Vauras in 2019 (unpublished) and validated here (MBT: 10007880). Figs. 5c, d:— FINLAND, Tavastia australis, Tamela, Mustiala, Runkomäki, Locis declivibus graminosis in horto Mustialensis, 15 September 1888, leg. & det. P. A. Karsten, P. A. K. No. 3223 (H!), GenBank: ITS ON 227436; ibidem, P. A. K. No. 3224 (H!), paratype .

Basidiospores star-shaped, ochraceous, provided with numerous knobs (9–12), 1.2–2.8 µm high, subisodiametric, (9.2–)10.2– 11.2 –12.3(–12.4) × (7.7–)8– 8.8 –9.5(–10.3) µm. Q = (1.1–)1.1– 1.2 –1.38(–1.4) (41 spores). Basidia hyaline, claviform, 4-spored. Cheilocystidia (48.2–)50.6– 61.6 –72.5(–74.9) × (17.2–)17.3– 18.9 –21.4(–21.6) µm, Q = (2.58–)2.6– 3.2 –4.09(–4.34) (11 cystidia), abundant, hyaline or showing a golden intracellular pigment, crystalliferous at apex, mostly lageniform, sometimes shortly pedicellate, with a shiny yellow reaction to ammonia; paracystidia clavate, hyalin. Pleurocystidia numerous, similar to cheilocystidia, (50.8–)51.5– 62.3 –69.7(–75) × (11.7–)13– 16.5 –20.5(–22) µm, Q = (2.8–)3.0– 3.8 –4.9(–5.3) (16 cystidia), hyaline or showing a golden-brown intracellular pigment, thick-walled (1.5–3.5 µm.) Hymenophoral Trama quite yellow. Caulocystidia abundant, lageniform to subfusiform (36.7–)41.4– 54.7 –68.4(–71.5) × (13.1–)13.6– 16.4 –19.5(–20.9) µm, Q = (2.31–)2.56– 3.3 –4.66(–5.1) (21 cystidia), crystalliferous, present from the apical part to the base of the stipe in tufts, with numerous hyaline clavate paracaulocystidia. Clamps present.

Additional collections examined of Inocybe subrimosa:— SPAIN, Madrid, Bustarviejo, Puerto de Canencia, under Betula alba, Pinus sylvestris, October 1975, C. Lado, AH 01210!; ibidem, 17 June 1976, C. Navarro, G. López, G. Moreno, AH 00630!; ibidem, Betula alba, 8 July 1977, C. Lado, G. Moreno, AH 09323; ibidem, Betula alba, 10 August 1977, J. M. Barrasa, G. Moreno, AH 09324! GenBank: ITS ON 259056; ibidem, Somosierra, Dehesa boyal, under Betula alba, 13 July 1988, G. Moreno, F. Esteve-Raventós, AH 29921!; ibidem, Bustarviejo, Puerto de Canencia, under Betula alba, 26 June 1992, M. Heykoop, F. Esteve-Raventós, AH 24635!; ibidem, 2 July 1992, J. Rejos, F. Esteve-Raventós, AH 24977!; ibidem, Somosierra, Dehesa Boyal, Betula alba, 30 June 1993, R. Valenzuela, F. Esteve-Raventós, AH 22147!; ibidem, Bustarviejo, Puerto de Canencia, under Betula alba, Pinus sylvestris, 2 June 1994, V. González, F. Arenal, F. Esteve-Raventós, AH 15695!; ibidem, AH 15697; ibidem, 28 May 1997, V. González, M. Villarreal, F. Esteve-Raventós, AH 22133; ibidem, Somosierra, Dehesa Boyal, 29 May 1997, M. Villarreal, C. Sánchez, F. Esteve-Raventós, AH 22154; ibidem, Bustarviejo, Puerto de Canencia, under Betula alba, 28 June 2003, J. C Campos, J. P. Campos AH 30818! GenBank: ITS KJ938776 (as Inocybe sp.); ibidem, Rascafría, Arroyo del Paraje, 40,831 224, -3,892679, 1420 m asl., under Betula alba, 16 June 2007, F. Pancorbo, AH 44474!, GenBank: ITS-LSU ON 259054; ibidem, Arroyo de La Angostura, 40.835642, -3.897870, 1272 m asl., under Betula alba, 30 June 2007, F. Pancorbo, AH 44475!, GenBank: ITS-LSU ON 259055; ibidem, under Betula alba, Pinus sylvestris, 11 June 2011, F. Pancorbo, AH 45141!; ibidem, AH 56399!; ibidem, AH 56400! SWEDEN, Jämtland, Lockne, Storvålen, under Pinus and Picea, 27 August 2018, E. Larsson 224-18 (GB!); Västergötland, Alingsås, Erska, Gräfsnäs slottsruin, under deciduous trees, 22 July 1980, L. & A. Stridvall LAS80/134 (GB-0064775!).