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 Add this item to the list  Trametes lactinea (Berk.) Sacc. Figure 1
Page number:274 
Remarks (internal):Differentiation between Trametes lactinea and Trametes elegans Because Trametes lactinea keys in the American literature as T. elegans (Gilbertson & Ryvarden 1987), we summarize here the most important characteristics of both species. Spores are clearly diagnostic - they are distinctly larger in T. lactinea (usually > 6 µm x 3 µm) and more curved and smaller (< 6 µm x 2.5 µm) in T. elegans (Fig. 1). Basidia of T. elegans are also quite small, only 8-13 x 4-6 µm. Unfortunately, many collections of both species are completely sterile. Trametes lactinea does not have hyphal pegs but all 6 studied specimens of T. elegans had pegs in the tubes that could be best seen on cut tubes under lens as scattered warts or protuberances on tube sides. Although this feature has never been mentioned in T. elegans descriptions, we regard it as rather constant. Pores of T. lactinea change in the course of basidiocarp development from thick-walled, round, and white to relatively thin-walled, angular, and brownish, but they are never labyrinthine, whereas in T. elegans they are mostly lamellate and when poroid, they are a bit elongated or labyrinthine at least in part of the fruitbody. The KOH reaction is only moderate in T. elegans: the hyphae swell slightly, without shrinking accompanied by quick hyphal movements. Unfortunately, the typical swelling reaction of T. lactinea skeletal hyphae is much weaker or less striking in very old herbarium specimens. The pileus surface of T. lactinea is quite variable but never glabrous, as it appears in most specimens of T. elegans (and never hirsute like by T. gibbosa (Pers.) Fr.). 
Description type:Non-original description 
Description:Trametes lactinea (Berk.) Sacc. Figure 1
Basidiomes annual to biennial, solitary to more rarely imbricate (when growing on short stumps), pileate, broadly to narrowly attached, 1-25 cm broad and wide, and 0.5-2 cm thick (exceptionally up to 7 cm thick at the base in specimens from the Northern USA), hard corky; pileus semicircular, mostly applanate but sometimes rather thick at the base, surface velvety, but with no hairs visible under 20x lens, becoming warted with age, sometimes with irregular outgrows especially near the base, azonate or very slightly concentrically sulcate, sometimes with narrow greyish zones near the margin or with wide, concentric furrows that mark periods of an intensive growth; margin obtuse and thick at first, sterile below, later sharpened, with pores developed to the very edge; pores at first white, later cream to ochraceous and darker than the upper surface, at first round, thick-walled, later with wedgenarrowed edges, in old specimens thin-walled, distinctly angular, but never labyrinthine, 2-3 per mm; tubes concolorous with the context, 6-12 mm long; context 5-20 mm, sometimes up to 60 mm thick, white, corky.
Hyphal system trimitic, generative hyphae clamped and thin-walled, 1-3 µm in diam.; skeletal hyphae abundant, hyaline, mostly with only moderately thickened walls, 4-6 µm in diam., but sometimes 3-4 µm broad and almost solid. After adding 10% KOH the solid hyphae swell to 10-15 µm in diam. and shrink quickly in vivid movements; in moderately thickened hyphae the swelled walls only fill the hole but the outer diameter remains unchanged. Binding hyphae abundant, hyaline, thick-walled, arboriform, 1-5 µm in diam.; basidia clavate, 4-sterigmate, 12-16 x 5-7 µm; cystidia none; basidiospores oblong-ellipsoid to cylindric, hyaline, negative in Melzer's reagent, 5-7 x 2.5-3.2 µm, thin-walled.
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