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Issue: Vol. 766 No. 3: 14 Jul. 2026
Type: Article
Published: 2026-07-14
DOI: 10.11646/phytotaxa.766.3.3
Page range: 241-256
Abstract views: 46
PDF downloaded: 1

Geographic range and taxonomic status review of selected Suillus species (Suillaceae, Boletales) in the UK

Jodrell Laboratory and Kew Fungarium; Royal Botanic Gardens Kew; UK
Jodrell Laboratory and Kew Fungarium; Royal Botanic Gardens Kew; UK
Jodrell Laboratory and Kew Fungarium; Royal Botanic Gardens Kew; UK
Type Specimen Holotype Historical Collections DNA barcode Map Fungi Great Britain

Abstract

Suillus is a genus of mushroom-forming fung of significant research interest and is widely distributed across the UK. This study provides an overview of the taxonomy, DNA barcode identification, and biogeography of British Suillus collections maintained by the Kew Fungarium and recorded by the British Mycological Society (BMS). Citations, taxonomic references, and type-specimen records were compiled, revealing multiple gaps in typification. Recent Kew Fungarium collections were rDNA barcoded (ITS1) and compared to existing sequences in GenBank. Most morphological identifications in the Fungarium were corroborated by DNA barcoding. The resulting phylogenetic tree, although constrained using a partial barcode, reflects relationships reported in previous studies, including unresolved species complexes. Occurrence data from the BMS were mapped to illustrate species’ geographic distributions across the UK and, in a separate analysis, correlated with collection dates to investigate potential changes in distribution over time. A dichotomous key to the species examined in this study is also provided.

References

  1. Andrew, C., Diez, J., James, T.Y. & Kauserud, H. (2019) Fungarium specimens: a largely untapped source in global change biology and beyond. Philosophical Transactions of the Royal Society B: Biological Sciences 374: 20170392. https://doi.org/10.1098/rstb.2017.0392
  2. Barla, J.B. (1859) Les champignons de la province de Nice et principalement les espèces comestibles. Imprimerie Canis frères. 300 pp.
  3. Bengtsson-Palme, J., Ryberg, M., Hartmann, M., Branco, S., Wang, Z., Godhe, A., De Wit, P., Sánchez-García, M., Ebersberger, I., de Sousa, F., Amend, A., Jumpponen, A., Unterseher, M., Kristiansson, E., Abarenkov, K., Bertrand, Y.J.K., Sanli, K., Eriksson, K.M., Vik, U., Veldre, V. & Nilsson, R.H. (2013) Improved software detection and extraction of ITS1 and ITS2 from ribosomal ITS sequences of fungi and other eukaryotes for analysis of environmental sequencing data. Methods in Ecology and Evolution 4: 914–919. https://doi.org/10.1111/2041-210X.12073
  4. Benson, D.A., Cavanaugh, M., Clark, K., Karsch-Mizrachi, I., Lipman, D.J., Ostell, J. & Sayers, E.W. (2012) GenBank. Nucleic Acids Research 41: D36–D42. https://doi.org/10.1093/nar/gks1195
  5. Blum, J. (1965) Essai de determination des bolets du groupe Granulatus.
  6. Bonfante, P. & Genre, A. (2010) Mechanisms underlying beneficial plant-fungus interactions in mycorrhizal symbiosis. Nature Communications 1: 48. https://doi.org/10.1038/ncomms1046
  7. Bonorden, H.F. (1861) Beiträge zur Mikologie. Botanische Zeitung 19 (29): 201–205.
  8. Branco, S., Bi, K., Liao, H.-L., Gladieux, P., Badouin, H., Ellison, C.E., Nguyen, N.H., Vilgalys, R., Peay, K.G., Taylor, J.W. & Bruns, T.D. (2017) Continental-level population differentiation and environmental adaptation in the mushroom Suillus brevipes. Molecular Ecology 26: 2063–2076. https://doi.org/10.1111/mec.13892
  9. Bresadola, G. (1891) Fungi Tridentini novi, vel nondum delineati, descripti, et iconibus illustrati. Vol. 1 (1). Edizioni Agricole. 14 pp.
  10. The British Mycological Society (2024b) The British Mycological Society. Available from: https://www.britmycolsoc.org.uk (accessed 31 August 2024)
  11. The British Mycological Society (2024) Fungal Records Database of Britain and Ireland. Available from: https://www.frdbi.org.uk (accessed 31 August 2024)
  12. Catalogue of Life (2024) Available from: https://www.catalogueoflife.org/ (accessed 31 August 2024)
  13. Courty, P.-E., Buée, M., Diedhiou, A.G., Frey-Klett, P., Le Tacon, F., Rineau, F., Turpault, M.-P., Uroz, S. & Garbaye, J. (2010) The role of ectomycorrhizal communities in forest ecosystem processes: New perspectives and emerging concepts. Soil Biology and Biochemistry 42: 679–698. https://doi.org/10.1016/j.soilbio.2009.12.006
  14. Dahlberg, A. & Stenlid, J. (1990) Population structure and dynamics in Suillus bovinus as indicated by spatial distribution of fungal clones. New Phytologist 115: 487–493. https://doi.org/10.1111/j.1469-8137.1990.tb00475.x
  15. Dahlberg, A. & Stenlid, J. (1994) Size, distribution and biomass of genets in populations of Suillus bovinus (L.: Fr.) Roussel revealed by somatic incompatibility. New Phytologist 128: 225–234. https://doi.org/10.1111/j.1469-8137.1994.tb04006.x
  16. Doyle, J. (1991) DNA protocols for plants. Molecular techniques in taxonomy. Springer, pp. 283–293. https://doi.org/10.1007/978-3-642-83962-7_18
  17. Edler, D., Klein, J., Antonelli, A. & Silvestro, D. (2021) raxmlGUI 2.0: A graphical interface and toolkit for phylogenetic analyses using RAxML. Methods in Ecology and Evolution 12: 373–377. https://doi.org/10.1111/2041-210X.13512
  18. Fries, E.M. (1815) Observationes mycologicae praecipue ad illustrandam floram Suecicam. Pars 1. G. Bonnier, Copenhagen, 320 pp. https://doi.org/10.5962/bhl.title.112534
  19. Fries, E.M. & Hök, C.T. (1835) Boleti, fungorum generis, illustratio. Regiae Academiae Typographia, Upsaliae, 16 pp.
  20. Fries, E.M. (1838) Epicrisis systematis mycologici seu synopsis hymenomycetum. Typographia Academica, Uppsala, 610 pp.
  21. Gange, A.C., Heegaard, E., Boddy, L., Andrew, C., Kirk, P., Halvorsen, R., Kuyper, T.W., Bässler, C., Diez, J., Heilman‐Clausen, J., Høiland, K., Büntgen, U. & Kauserud, H. (2018) Trait‐dependent distributional shifts in fruiting of common British fungi. Ecography 41: 51–61. https://doi.org/10.1111/ecog.03233
  22. Gardes, M. & Bruns, T.D. (1993) ITS primers with enhanced specificity for basidiomycetes—application to the identification of mycorrhizae and rusts. Molecular Ecology 2: 113–118. https://doi.org/10.1111/j.1365-294X.1993.tb00005.x
  23. Garnier, S. (2015) viridis: Colorblind-Friendly Color Maps for R. 0.6.5. https://doi.org/10.32614/CRAN.package.viridis
  24. GBIF.Org User (2024a) Occurrence Download. https://doi.org/10.15468/dl.p3kuuh
  25. GBIF.Org User (2024b) Occurrence Download. https://doi.org/10.15468/dl.xmxvwe
  26. Geneious Prime. (2024) Version 2024.0.5. [https://www.geneious.com]
  27. Gerhold, N. (1985) Taxonomische Klarstellungen in der Sektion Laringi Singerder Gattung Suillus Micheli ex SF Gray. DGfM.
  28. Gray, S.-F. (1821) A natural arrangement of British plants (etc.). Baldwin, London, 775 pp.
  29. Hesling, E., Taylor, A.F. & others (2013) Ectomycorrhizal fungi associated with Arctostaphylos uva-ursi in Scotland: Exploring the biogeography of undiscovered fungal communities. Karstenia 53: 39–47. https://doi.org/10.29203/ka.2013.456
  30. Index Fungorum (2024a) Index Fungorum. Available from: https://www.indexfungorum.org/ (access 17 August 2024)
  31. Inzenga, G. (1869) Funghi Siciliani. Centuria II. F. Lao, Palermo. 79 pp.
  32. Katoh, K. & Standley, D.M. (2013) MAFFT Multiple Sequence Alignment Software Version 7: Improvements in Performance and Usability. Molecular Biology and Evolution 30: 772–780. https://doi.org/10.1093/molbev/mst010
  33. Kennedy, P.G., Gagne, J., Perez-Pazos, E., Lofgren, L.A. & Nguyen, N.H. (2020) Does fungal competitive ability explain host specificity or rarity in ectomycorrhizal symbioses? PLOS ONE 15: e0234099. https://doi.org/10.1371/journal.pone.0234099
  34. Kibby, G. (2017) British Boletes: with key to species. 8th ed.
  35. Kibby, G. (2020) Mushrooms and Toadstools of Britain & Europe. volume 1, Puffballs, Earthstars, Stinkhorns, Chanterelles Toothed Fungi, Club Fungi, Coral Fungi, Polypores, Crust Fungi, Boletes & their relatives, Russula & Milkcaps. 3rd edition. Geoffrey Kibby, London.
  36. Klotzsch, J.F. (1832) Mycologische Berichtigungen zu der nachgelassenen Sowerbyschen Sammlung. Linnaea 7: 193–204.
  37. Kuntze, O. (1898) Revisio generum plantarum. Vol. 3, Arthur Felix, Dulau & Co., Leipzig, 576 pp.
  38. Linné, C. (1753) Species plantarum, exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Tomus 2. Holmiae, pp. 561–1232. https://doi.org/10.5962/bhl.title.59734
  39. Lofgren, L., Nguyen, N.H., Kennedy, P., Pérez-Pazos, E., Fletcher, J., Liao, H.-L., Wang, H., Zhang, K., Ruytinx, J., Smith, A.H. & others (2024) Suillus: an emerging model for the study of ectomycorrhizal ecology and evolution. New Phytologist 242 (4): 1448–1475. https://doi.org/10.1111/nph.19700
  40. Lofgren, L.A., Nguyen, N.H., Vilgalys, R., Ruytinx, J., Liao, H.-L., Branco, S., Kuo, A., LaButti, K., Lipzen, A., Andreopoulos, W., Pangilinan, J., Riley, R., Hundley, H., Na, H., Barry, K., Grigoriev, I.V., Stajich, J.E. & Kennedy, P.G. (2021) Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi. New Phytologist 230: 774–792. https://doi.org/10.1111/nph.17160
  41. Maddison, W.P. & Maddison, D.R. (2023) Mesquite: a modular system for evolutionary analysis.
  42. Manian, S., Sreenivasaprasad, S., Bending, G.D. & Mills, P.R. (2001) Genetic diversity and interrelationships among common European Suillus species based on ribosomal DNA sequences. FEMS Microbiology Letters 204: 117–121. https://doi.org/10.1111/j.1574-6968.2001.tb10873.x
  43. Marmeisse, R., Guidot, A., Gay, G., Lambilliotte, R., Sentenac, H., Combier, J.-P., Melayah, D., Fraissinet-Tachet, L. & Debaud, J.c. (2004) Hebeloma cylindrosporum—a model species to study ectomycorrhizal symbiosis from gene to ecosystem. New Phytologist 163: 481–498. https://doi.org/10.1111/j.1469-8137.2004.01148.x
  44. Martin, F., Kohler, A., Murat, C., Veneault-Fourrey, C. & Hibbett, D.S. (2016) Unearthing the roots of ectomycorrhizal symbioses. Nature Reviews Microbiology 14: 760–773. https://doi.org/10.1038/nrmicro.2016.149
  45. Martínez-Peña, F., de-Miguel, S., Pukkala, T., Bonet, J.A., Ortega-Martínez, P., Aldea, J. & Martínez de Aragón, J. (2012) Yield models for ectomycorrhizal mushrooms in Pinus sylvestris forests with special focus on Boletus edulis and Lactarius group deliciosus. Forest Ecology and Management 282: 63–69. https://doi.org/10.1016/j.foreco.2012.06.034
  46. Min, Y.J., Park, M.S., Fong, J.J., Seok, S.J., Han, S.-K. & Lim, Y.W. (2014) Molecular Taxonomical Re-classification of the Genus Suillus Micheli ex S. F. Gray in South Korea. Mycobiology 42: 221–228. https://doi.org/10.5941/MYCO.2014.42.3.221
  47. Muñoz, J.A. (2005) Boletus s.l: excl. Xerocomus: Strobilomycetaceae, Gyroporaceae, Gyrodontaceae, Suillaceae, Boletaceae. Candusso, Alassio. 952 pp.
  48. Murrill, W.A. (1912) Polyporaceae and Boletaceae of the Pacific Coast. Mycologia 4 (2): 91–100. https://doi.org/10.2307/3753546
  49. Nguyen, N.H., Vellinga, E.C., Bruns, T.D. & Kennedy, P.G. (2016) Phylogenetic assessment of global Suillus ITS sequences supports morphologically defined species and reveals synonymous and undescribed taxa. Mycologia 108: 1216–1228.
  50. Nordberg, H., Cantor, M., Dusheyko, S., Hua, S., Poliakov, A., Shabalov, I., Smirnova, T., Grigoriev, I.V. & Dubchak, I. (2014) The genome portal of the Department of Energy Joint Genome Institute: 2014 updates. Nucleic Acids Research 42: D26–D31. https://doi.org/10.1093/nar/gkt1069
  51. Palm, M.E. & Stewart, E.L. (1986) Typification and Nomenclature of Selected Suillus Species. Mycologia 78: 325–333. https://doi.org/10.1080/00275514.1986.12025254
  52. Pérez-Pazos, E., Certano, A., Gagne, J., Lebeuf, R., Siegel, N., Nguyen, N. & and Kennedy, P.G. (2021) The slippery nature of ectomycorrhizal host specificity: Suillus fungi associated with novel pinoid (Picea) and abietoid (Abies) hosts. Mycologia 113: 891–901. https://doi.org/10.1080/00275514.2021.1921525
  53. Peck, C.H. (1872) Report of the Botanist (1869). Annual Report on the New York State Museum of Natural History 23: 27–135.
  54. Peck, C.H. (1900) New Species of Fungi. Bulletin of the Torrey Botanical Club 27 (12): 609–613. https://doi.org/10.2307/2477998
  55. Presl, J.S. (1846) Wšeobecný rostlinopis. Vol. 2. 1007–2072.
  56. Policelli, N., Bruns, T.D., Vilgalys, R. & Nuñez, M.A. (2019) Suilloid fungi as global drivers of pine invasions. New Phytologist 222: 714–725. https://doi.org/10.1111/nph.15660
  57. Quélet, L. (1886) Enchiridion fungorum in Europa media et praesertim in Gallia vigentium. Octave Doin, Lutetiae. 352 pp. https://doi.org/10.5962/bhl.title.47025
  58. Rahmstorf, S., Foster, G. & Cahill, N. (2017) Global temperature evolution: recent trends and some pitfalls. Environmental Research Letters 12: 054001. https://doi.org/10.1088/1748-9326/aa6825
  59. Redeuilh, G. (1992) Novitates—Combinaison nouvelle. Documents Mycologiques 22 (86): 40–40.
  60. Redeuilh, G. & Simonini, G. (1997) Comitato internazionale per l’unificazione dei nomi dei boleti Europei—Schede del gruppo III (Suillus ss. lato). Pagine di Micologia 10: 1–28.
  61. Redeuilh, G. & Simonini, G. (1999) Comitato internazionale per l’unificazione dei nomi dei boleti Europei—Schede del gruppo IV (Revisione delle schede “gruppo edulis,” Xerocomus e Suillus ss. lato). Pagine di Micologia 12: 95–128.
  62. Roussel, H.F.A. (1796) Flore du Calvados et terrains adjacents, composée suivant la méthode de Jussieu. 268 pp.
  63. Saccardo, P.A. (1888) Sylloge fungorum omnium hucusque cognitorum. Vol. VI. Typis Seminarii, Patavia.
  64. Shi, X., Zhang, S., Mueller, G.M., Liu, P., Yu, F. & Senanayake, I.C. (2025) A subgeneric revision of the genus Suillus (Suillaceae, Boletales) and novel taxa from Eastern Asia based on morphology and multigene phylogenies. IMA Fungus 16: e144260. https://doi.org/10.3897/imafungus.16.144260
  65. Singer, R. (1945a) Notes on Farlow’s Agaricales from Chocorua. Farlowia 2 (1): 39–51. https://doi.org/10.5962/p.316002
  66. Singer, R. (1945b) The Boletineae of Florida with notes on extralimital species. II. The Boletaceae (Gyroporoideae). Farlowia 2 (2): 223–303. https://doi.org/10.5962/p.316008
  67. Singer, R. (1966) Notes and brief articles. The type of Boletus amabilis. Mycologia 58 (1): 157–159. https://doi.org/10.1080/00275514.1966.12018305
  68. Smith, A.H. & Thiers, H.D. (1964) A Contribution Toward a Monograph of North American Species of Suillus. Lubrecht & Cramer Ltd, Ann Arbor, Michigan.
  69. Smith, N. (2017) British larch-associated Basidiomycota: a review. Field mycology 18: 98–103. https://doi.org/10.1016/j.fldmyc.2017.07.010
  70. Swartz, O. (1810) Svamparter, saknade i Fl. Svec. L., fundne i Sverige och beskrifne (tra gli altri funghi: Boletus variegatus). Kongliga Vetenskaps Academiens Nya Handlingar 31 (1): 1–12.
  71. Turland, N.J., Wiersema, J.H., Barrie, F.R., Gandhi, K.N., Gravendyck, J., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Klopper, R.R., Knapp, S., Kusber, W.H., Li, D.Z., Marhold, K., May, T.W., Monro, A.M., Prado, J., Price, M.J., Smith, G.F. & Señoret, J.C.Z. (2025) International Code of Nomenclature for algae, fungi, and plants (Madrid Code). Regnum Vegetabile 162. The University of Chicago Press, Chicago. https://doi.org/10.12705/Code.2018
  72. Van Nuland, M.E., Qin, C., Pellitier, P.T., Zhu, K. & Peay, K.G. (2024) Climate mismatches with ectomycorrhizal fungi contribute to migration lag in North American tree range shifts. Proceedings of the National Academy of Sciences 121: e2308811121. https://doi.org/10.1073/pnas.2308811121
  73. Watling, R. (1998) The role of the amateur in mycology—what would we do without them! Mycoscience 39: 513–522. https://doi.org/10.1007/BF02460913
  74. Watling, R., Hills, A.E. & Turnbull, E. (2005) British fungus flora : Agarics and Boleti. 1, Boletes and their allies: Boletaceae : Strobilomycetaceae : Gyroporaceae : Paxillaceae : Coniophoraceae : Gomphidiaceae. Rev. enl. ed. Edinburgh Royal Botanic Garden.
  75. White, T.J., Bruns, T., Lee, S., Taylor, J. & others (1990) Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. PCR protocols: a guide to methods and applications 18: 315–322. https://doi.org/10.1016/B978-0-12-372180-8.50042-1
  76. Wickham, H. (2016) ggplot2: elegant graphics for data analysis. Second edition. Springer, Switzerland. 260 pp.
  77. Wilgan, R., Dyderski, M.K., Pietras, M., Walas, Ł., Kolanowska, M. & Leski, T. (2025) Northward shifting in the distribution of optimal niches for Tuber aestivum, Tuber melanosporum, and their ectomycorrhizal tree partners in Europe. Acta Oecologica 126: 104057. https://doi.org/10.1016/j.actao.2025.104057
  78. Zhang, R., Shi, X., Liu, P., Wilson, A.W. & Mueller, G.M. (2022) Host Shift Speciation of the Ectomycorrhizal Genus Suillus (Suillineae, Boletales) and Biogeographic Comparison With Its Host Pinaceae. Frontiers in Microbiology 13. https://doi.org/10.3389/fmicb.2022.831450
  79. Zvyagina, E.A. & Sazanova, N.A. (2025) Suillus kovalenkoi (Boletales, Agaricomycetes), a new Larix-associated species from North Asia. Phytotaxa 702 (3): 231–254. https://doi.org/10.11646/phytotaxa.702.3.1

How to Cite

Baugh, M.S., Gelardi, M. & Bazzicalupo, A.L. (2026) Geographic range and taxonomic status review of selected Suillus species (Suillaceae, Boletales) in the UK. Phytotaxa 766 (3): 241–256. https://doi.org/10.11646/phytotaxa.766.3.3