Inocybe subrimosa (P. Karst.) Sacc., Sylloge Fungorum

Esteve-Raventós, Fernando, Pancorbo, Fermín, Larsson, Ellen, Turégano, Yolanda, Moreno, Gabriel & Altés, Alberto, 2022, Inocybe vaurasii (Agaricales, Inocybaceae), a new species of the I. xanthomelas group and similar European species with asteriform spores, Phytotaxa 566 (2), pp. 171-188 : 182

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material: lectotype of I. subrimosa (as Clypeus subrimosus) invalidly designated by S. Huhtinen & J. Vauras in 2019 (unpublished) and validated here ( MBT: 10007880).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!).

Figures

FIGURE 4. Fresh basidiomata in situ. a, d. Inocybe humilis AH 56423. b, e. Inocybe xanthomelas AH 47646. c, f. Inocybe subrimosa AH 44474. Scale bar: 20 mm. Photos: F. Pancorbo.

FIGURE 5. Vouchers and SEM spores of types. a, b. Inocybe humilis J. Favre, G00126386, Z.S. 583. Holotype. c, d. Inocybe subrimosa (P. Karst.) Sacc. P.A.K. No. 3223 (H). Lectotype. e, f. Inocybe xanthomelas Boursier & Kühner, « Mail var. affinis » G00127626. Lectotype. Scale bar: 2 µm = b, d, f; 10 mm = a, c, e. Photos: G. Moreno.