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 Add this item to the list   B. quercinus (Fr.) Kotlaba and Pouzar
Page number:1-222 
Description type:Non-original description 
Description:B. quercinus (Fr.) Kotlaba and Pouzar
Polyporus quercinus Fr., Epicr. (1838) 441.
Piptoporus quercinus (Fr.) Pilat, Ad. Champ. Eur. 30-31 (1937) 124; Imazeki, Bull. Govt. For. Exp. St. Meguro 42 (1949) 9; Ryvarden, Polyp. N. Eur. 2 (1978) 376.
?B. pulvinus (Pers.) Donk, Proc. K. Ned. Akad. Wet (C) 74 (1971) 4; Check List Eur. Polyp. (1974) 33; Ryvarden l.c. 377.
Pores 300-500 µm wide, white then brownish with age or on bruising (Pilat).
Spores 6-8 x 2.5-3.5 µm, hyaline to very plale yellowish, subfusiform, thin-walled, not amyloid (Ryvarden); 7-10 x 3-4 µm (Bourd. et Galz.). Cystidia none. Hyphae of the flesh dimitic with intrusive binding processes, not amyloid, not dextrinoid, not encrusted; at first monomitic with the binding processes reaching to 0.5 mm from the margin of the pileus. Generative hyphae 4-8 µm wide, clamped, with thin or firm walls, the cells up to 130 µm long (? more), the growing tips 3-5 µm wide, scarcely inflating, persistent. Binding processes 4-6.5 µm wide on origin, arising singly from the generative cells, terminal or lateral, wall much thickened, with linear lumen, swelling slightly in potash, tapering to obtuse tips 1.5-2.5 µm wide, mostly unbranched, occasionally once furcate, up to 1100 µm long overall (? more), becoming interwoven in all directions. Dissepiments monomitic, somewhat agglutinated in dried material, the hyphae 2-3 µm wide, clamped, strictly descending.
Surface of pileus with a pile of sparsely septate and clamped ends of generative hyphae.
Material: Central Bohemis ap. Skryje, 28 Sept. 1966, leg. Z. Pouzar; Bohemia ap. Zatec, 26 Aug. 1972, leg. F. Kotlaba. (Collections from Herb. Mycol. Mus. Nat. Pragae).
The walls of the generative hyphae stain rather deeply with Congo Red, but not those of the binding processes except where they arise from the generative hyphae. Here the process begins as a wide thickwalled hypha which gradually tapers to its apex; it has no narrow mediate part like a skeletal hypha, and it corresponds, rather, with the skeletal cells found in some species of Pleurotus (Corner 1981). No gelatinous tissue was observed in the flesh.
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