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Page number:127 
Description type:Non-original description 
Description:Nigroporus vinosus (Berk.) Murr. Figure 14 Bull. Torrey bot Club 32 (1905) 361; Ryvarden and Johansen (1980) 448.
Pileus -6.5 cm in radius, -12.5 cm wide in mesopodal forms, -10.5 cm wide in dimidiate forms, stipitate or sessile, occasionally dorsifixed, mesopodal to pleuropodal, often with a sterile discoid base, varying shortly effuso-reflexed, rarely with a widespread resupinate part, often imbricate, slightly ascending, thin, matt, dull, varying subnitid in old specimens, narrowly closely and faintly sulcato-zoned, occasionally strongly so towards the base, often subtuberculate at the base with patchy outgrowths, dark fuscous vinaceous with darker faint zones, finally blackish purplish from the base outwards, lighter coloured and pinkish violaceous towards the pinkish brown margin; margin entire, obtuse to subacute, often lobed in old specimens. Tubes 1-3 mm long, often in 2-3 distinct layers not separated by layers of flesh, 0.3-0.5 mm at 5 mm from the margin of the pileus, soon stuffed with hyphae, concolorous with the flesh or darker; pores 50-90 µm wide, minute, angular, dissepiments 20-80 µm thick, pale to dark vinaceous drab, rather waxy (under a lens) when fresh. Flesh 1-8 mm thick at the base of the pileus, 0.5-1.5 mm at 5 mm from the margin, woody-coriaceous, pliant, thin, vinaceous drab or pallid to dark purplish brown, without a crust or with a very thin dark superficial crust.
On dead wood in primary and secondary forest, lowland and montane -1500 m alt. Pantropical, common in Malesia.
Spores 3-4 x 1.5 µm, white in the mass, smooth, ellipsoid to subreniform, not allantoid, with a minute gutta 0.5 µm wide at each end or several guttulae, not amyloid or dextrinoid. Basidia 6-9 x 4-5 µm, subclavate; sterigmata 4, 2 µm long. Cystidia and hyphal pegs none. Hymenium fertile up to 0.5-1 mm from the pore-mouths, the old hymenium honey-comb like. Hyphae more or less dimitic (dl to d3) or subtrimitic in the flesh, truly dimitic in the dissepiments, not encrusted, not dextrinoid; skeletal hyphae 3.5-5 µm wide, aseptate, unbranched, unlimited, with pale vinaceous brown walls thickening almost to occlude the lumen, or very distantly clamped and branched as long intercalary cells, scarcely swelling in potash but slightly darkening; generative hyphae 1.5-4.5 µm wide, clamped, with thin or slightly thickened and pale vinaceous walls 0.5-1.5 µm, transitional to the branched skeletals, cells 25-450, µm long, some narrow hyphae 1.52.5 µm wide copiously branched and lobed with slightly thickened walls as if binding hyphae but septate and clamped; dissepiments strictly dimitic with skeletals 3-3.5 µm wide, not agglutinated. Surface of pileus with appressed hyphal ends, becoming thinly levigate with generative hyphae and finally agglutinated into a very thin blackish brown crust -40 µm thick, scarcely encrusted (thick sections giving off a pale brownish solution in potash).
The hyphal construction is varied. Some collections appear to be almost trimitic; others are dimitic and, yet, others are almost monomitic with elongate intercalary skeletal cells. Thus, it varies from the states which I have called dl to 0 and what could be called tl (subtrimitic). These differences occur in different collections. The type (herb. Berkeley, n. 43, St. Domingo) is 0 to tl, with pores 50-70 µm wide, and no cystidia; it looks just like old glabrous specimens of Malaya.
A collection which I made in Hokkaido with Dr K. Aoshima and for which he suggested the name, Fomes cassandrae, is N. vinosus with dimitic hyphae, wider pores 100-200 µm, a slightly thicker crust, and smaller spores 2-2.7 x 0.7 µm. I have also collected typical N. vinosus in Brazil.
 
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