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 Add this item to the list   HAPALOPILUS NIDULANS (Fr.) Karst.
Page number:361 
Remarks (public):A good field characteristic is the cinnamoncoloured, soft and watery fruitbody in fresh condition. The striking violet reaction in KOH is unique. 
Description type:Non-original description 
Description:HAPALOPILUS NIDULANS (Fr.) Karst.
Rev. Mycol. 3:18, 1881. - Polyporus nidulans Fr. Syst. Mycol. 1:362, 1821. - Polyporus rutilans Fr. Syst. Mycol. 1:633, 1821.
FRUITBODIES annual, pileate, broadly sessile dimidiate, mostly convex, often almost triangular in section, up to 10 cm wide and long, but usually smaller, up to 4 cm thick at the base, soft and watery when fresh, light and somewhat brittle when dry, all parts of the fruitbody light violet to purplish with KOH. PILEUS cinnamon to ochraceous, first finely tomentose to scrupose with small adpressed tufts of hyphae, but soon completely smooth, azonate or with a few broad, weakly sulcate zones, the inner ones usually smoother than the distal ones, margin acute and entire. PORE SURFACE ochraceous to cinnamon brown, usually with a distinct sterile edge towards the substrate and margin, pores thinwalled and angular, 2-4 per mm, the pore surface often with a few larger cracks in larger fruitbodies, tubes up to 10 mm deep, ochraceous or white due to cottony sterile hyphae. CONTEXT light cinnamon, mostly distinctly lighter in colour towards the pileus, soft and fibrous and quite brittle, up to 4 cm deep at the base.
HYPHAL SYSTEM monomitic, generative hyphae with clamps, in the context, up to 10 µm wide and with conspicuous clamps, distinctly thick-walled and richly branched, mostly smooth, but also covered partly in amorphus substances mixed with polygonal light pinkish to brownish crystals, in the trama and hymenium more straight and narrow, up to 6 µm wide. CYSTIDIA none. SPORES ellipsoid to cylindrical, hyaline, thin-walled, smooth and non-amyloid, 3.5-5 x 22.5(3) µm.
HABITAT. On dead deciduous wood.
DISTRIBUTION. The species is widespread in the Northern Hemisphere and has only once been found in Africa: Rwanda-Burundi, Akagera park, S.W. of Luluma, Ihema lake, 15.8.1974, leg. Rammeloo 4317 (0).

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