Taxonomic Digest of Boletellus

Pileus typically dry, rarely subviscid, scaly or tomentose, microscopically a trichodermium, sometimes with appendiculate remnants at margin. Context white or yellow, often changing to blue. Hymenophore tubulose, adnexed, white at first, soon yellow, often staining blue. Stipe central, usually pruinose, rarely with an apical reticulum, dry, sometimes staining blue; basal mycelium white, very rarely yellow. Spores olive brown in deposit, longitudinally ridged/winged or slightly veined, inamyloid or rarely dextrinoid. Hymenial cystidia usually present. Clamp connections usually absent, rarely present (one sp., B. fibuliger). KOH & NH₄OH reactions negative (more species need testing).
Distribution: Worldwide, but not southern South America.
Ectomycorrhizae: Pinaceae, Fagaceae, Myrtaceae, Dipterocarpaceae, Casuarinaceae, Caesalpiniaceae.

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ananaeceps (Berk.) Sing., Sydowia 9: 423. 1955 ananas (Curt.) Murr., Mycologia 1: 10. 1909 badiovinosus Horak, Kew Bull. 31: 650. 1976 cardinalicus Heim & Perreau, Rev. Mycol. (Paris) 28: 193. 1963 cerasinus Heim & Perreau, Cah. La Maboké 2: 16. 1964 chrysenteroides (Snell) Sing., Mycologia 33: 422. 1941 cubensis (Berk. & Curt.) Sing., Farlowia 2: 127. 1945 cyanescens Horak, Kew Bull. 31: 649. 1976 dissiliens (Corner) Pegler & Young, Trans. Brit. Mycol. Soc. 76: 113. 1981 dicymbophilus Fulgenzi & T.W. Henkel, Mycologia 100: 493. 2008. elatus Nagasawa, Trans. Mycol. Soc. Japan 25: 361. 1984 emodensis (Berk.) Sing., Ann. Mycol. 40: 18. 1942 episcopalis Heim & Perreau, Rev. Mycol. (Paris) 28: 191. 1963 exiguus T.W. Henkel & Fulgenzi, Mycologia 100: 490. 2008. fibuliger Sing., Beih. Nova Hedwigia 77: 154. 1983 flocculosipes (Murr.) Perreau, Ann. Sci. Nat. ser. 12, 5: 764. 1964 immutabilis (Bouriquet) Perreau, Rev. Mycol. (Paris) 28: 191. 1963 intermedius Smith & Thiers, Boletes Michigan 387. 1971 jalapensis (Murr.) Gilb., Bolets 107. 1931 lepidosporus Gilb. ex Heinem. Bull. Jard. Bot. Nat. Belg. 21: 293. 1951 linderi Sing., Farlowia 2: 134. 1945 longicollis (Ces.) Pegler & Young, Trans. Brit. Mycol. Soc. 76: 115. 1981 longipes Heinem., Bull. Jard. Bot. Brux. 21: 292. 1951 longipes var. flavoporus Heinem. & Rammeloo, Bull. Jard. Bot. Nat. Belg. 60: 416. 1990 obscurecoccineus (v. Höhn.) Sing., Farlowia 2: 127. 1945

pictiformis (Murr.) Sing., Farlowia 2: 131. 1945 pleurigibbus Heim & Perreau, Cah. La Maboké 2: 19. 1964 pseudochrysenteroides Smith & Thiers, Boletes Michigan 384. 1971 pustulatus (Beeli) Gilb., Bolets 107. 1931 radiatus C. S. Bi, Acta Mycol. Sin. 3: 200. 1984 rubrolutescens Heinem. & Rammeloo, Bull. Jard. Bot. Nat. Belg. 60: 417. 1990 rubroviolaceus Heinem. & Goossens, Bull. Jard. Bot. Brux. 21: 296. 1951 rufescens (Cooke & Massee) Singer, Sydowia 9: 423. 1955 russellii (Frost) Gilbert, Les Bolets 107. 1931 singeri Gonz.-Velázq. & R. Valenz., Mycotaxon 55: 400. 1995 squamosus M. Zang, Act. Bot. Yunnanica 7: 392. 1985 umbrinellus (Pat. & Baker) Singer et al., Beih. Nova Hedwigia 77: 86. 1983 velutinus Heinem. & Rammeloo, Bull. Jard. Bot. Nat. Belg. 60: 417. 1990 violaceiporus G. Stevenson, Kew Bull. 15: 384. 1961 violaceus M. Zang & H. C. Tan, Act. Bot. Yunnanica 7: 393. 1985 viscidipes (Hongo) Har. Takah., MSJ News 1993-l (no. 20): 22. 1993 viscosus C. S. Bi & T. C. Loh, Act. bot. Yunnanica 4: 55,57. 1982 xerampelinus M. Zang & W. K. Zheng, Act. Bot. Yunnanica 8: 21. 1986 = Heimioporus. . . fide Horak yunnanensis M. Zang, Act. Bot. Yunnanica 7: 394. 1985 zelleri (Murr.) Sing., Snell, & Dick, Mycologia 51: 575. 1959

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