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Page number:297 
Description type:Non-original description 
Description:GANODERMA LUCIDUM (Leys.:Fr.)P. Karst., Rev. Mycol. 3 (9): 17.1881.
= Boletus lucidus Leys. Fl. Halensis p. 300. 1783. = B. dimidiatus Thunb., Fl. p. 348, tab. 39. 1784 (Fide Imazeki). = B. laccatus Timm, F1. megalop. Prodr., p. 269. 1788 (Fide Imazeki).
= Polyporus lucidus Leys.:Fr., Syst. Mycol. I: 353. 1821. = P. laccatus Timm:Pers., Mycol. europ. 2: 54. 1825 (Fide Imazeki). = P. japonicus Fr., Epicr. p. 442. 1838 (Fide Imazeki) lucidus (Leys.:Fr.) Sacc., Syll. Fung. 6: 157. 1881. = Placodes lucidus (Curt.:Fr.)Quél., Fl. Mycol. p. 399. 1888 (Fide Domanski). = F. japonicus Fr. in Sacc., Syll. Fung. 6: 156. 1888 (Fide Imazeki). = Ganoderma pseudoboletus(Jacq.) Murr., Bull. Torrey bot. Cl. 29: 602. 1902 (Fide Imazeki). = G. laccatum Pat. in Bresadola, Icon. Mycol. 21, t. 1004. 1932, non G. laccatum Bourd. & Galz. 1928. Icon. Michael & Henning, Pilzfr. 2, t. 73. 1960 (Fide Domanski et al.).
Annual, sessile and dimidiate or, more frequently with a lateral stem and then usually reniform (Figs. 1,3). Pilei isolated, small to medium sized, 2-8 x 2-4,5 x 0,5-2 cm. Pileus surface radially rugose and concentrically sulcate, brilliantly laccate, light reddish brown (Pl. 6 L 12 of Maerz & Paul), to dark reddish brown or mahogany (Pl. 7 L 6). Margin sterile, generally thick and blunt, sometimes acute, white in actively .growing specimens, becoming yellowish and reddish brown inwards; in older specimens of the same colour as pileus surface, and then incurved. Stem lateral, vertical, cylindric, usually long, Blender, tortuous, 4-10 cm long,0,5-2 cm thick, reddish black to almost black, laccate, brilliant, somewhat thicker at the base. Cutis thin, brilliant black. Context almost as thick as the tube layer but thickening towards the base of the stem, ochraceous brown when young (Pl. 13 H 10) to dark brown when mat-ure (Pl. 14 L 12), corky. Dermis of the "hymenodermis" type, composed of thick, golden walled, claviform elements originating from the ends of skeletal hyphae, with narrow lumina and blunt ends, arranged in a palisade-like hymenium (Fig. 62), 5-10 mm thick, the total thickness of the dermis 14-42 mm. These elements are covered by a thick layer of a lacque-like substance that dissolves in a hot solution of 5% KOH. Hymenophore white to yellowish white when young, greyish white in mature specimens (Figs. 2, 4) with a tube layer up to 7 mm long, slightly lighter than context (Pl. 13 D 8). Pores small, round, somewhat irregular, 4-7 per mm, 6-200 mm diam. Dissepiments 17-116 ,mm diam. Hymenium not persistent, composed of scant globose to subglobose basidia, 9-19 x 7-14 µm. No other hymenial elements pres-
ent. Basidiospores subovoid with the apex truncate, perisporium hyaline, smooth and thin, and endosporium golden with relatively scant endosporic pillars, wide and long, reaching the perisporium and rumpling it so that it appears strongly "rugose" (Figs. 23-25, 61); 9-13 x 5-6,9 µm. Hyphal system trimitic with hyaline,thin-walled,clamped,septate generatives, 1-4 µm diam.,septa restricted to clamps, scantily branched, abundant at the growth margin of pileus and dissepiments, rare or absent in the context (Fig. 71). Skeletals "arboriform" (Teixeira, 1956), aseptate, clampless, very long, 3-6 pm diam., scantily branched, branches with limited growth at distal end, with thick golden walls, sometimes subsolid; they compose most of the context and dissepiments, originating immediately behind the growth margin from generative hyphae (Fig. 68). Binding hyphae of the "Bovista" type (Cunningham,1946a), aseptate, clampless, profuse ly branched, tortuous, of limited growth, generally thinner and ligliter than the skeletall, 1-3 µm diam., rather scant and only present in the context; they are intertwined with the latter, giving the context its firm cohesion (Figs. 6970).
Hosts: at the base of trunks and on roots of harwoods, rarely on conifers. Recorded also on Acer, Quercus, Castanea, Alnus, Populus, Fagus, Fraxinus and Pinus (Domanski, 1967). According to Domanski (loc. cit.) it grows saprophytically and only exceptionally attacks living trees. Boyce (1938) agrees with this. However, Pirone (1957) through experiments with Acer proved that it is an important parasite of hardwoods.
Distribution:apparently worldwide in temperate and tropical zones.It has been recorded for Europe, Asia, Philippines, Australia, Africa and North and South America (in the latter for Venezuela, Brazil, Uruguay and Argentina).
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