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Page number:111 
Description type:Non-original description 
Description:Trametes lactinea (Berk.) Pat. Figure 8 Ess. Taxon (1900) 92; Cunningham (1965) 163; Bakshi (1971) 169; Ryvarden and Johansen (1980) 567; Banerjee, Oest. bot. Zeitschr. 108 (1961) 184 (karyologie).
Pileus -7.5 cm in radius, sessile, sometimes with a discoid base, dimidiate, horizontal, velutinate to matt, developing small pads or tubercles 1-2 mm thick at the base of old specimens, azonate or faintly zoned, white, sometimes with faint brownish zones, drying pale brownish buff. Tubes -13 mm long, sometimes in 2-3 indistinct zones, white; pores 160-300(-500) µm wide, dissepiments 100-300(-500) µm thick, subcircular, in some collections shortly radially elongate to sublamelliform, white. Flesh 3-15 mm thick at the base of the pileus, 1-3 mm near the margin, fibrous-coriaceous to corky, white, without a crust.
On dead trunks in the open and in the forest. Palaeotropical; fairly common in Malesia.
Spores 5.5-6.5(-7) x 2.5-3 µm, white, smooth, ellipsoid to subcylindric, thinwalled, inamyloid. Basidia 16-20 x 4-5 µm; sterigmata 4, 3 µm long. Cystidia none, but the ends of binding hyphae often intrusive into the hymenium. Hyphal pegs frequent to sparse or none. Hyphae trimitic, clamped, not encrusted, not dextrinoid; skeletals 4-7 µm wide, 6-9 µm in potash and sometimes pinkish, walls -2.5 µm thick, lumen often linear, aseptate, unbranched, unlimited or some ending in 1-4 branches dividing into binding hyphae; binding hyphae 3-4.5 µm wide, dividing into branches 2-3 µm wide and often tapering into more or less filiform tips, intricate, abundant, derived from generative hyphae and from the ends of some skeletals; generative hyphae 25 µm wide, clamped, thin-walled or with skeletal cells producing binding hyphae; dissepiments densely trimitic. Surface of pileus anoderm with slowly excrescent ends of all the kinds of hyphae and forming the pads at the base of the pileus, no crustaceous layer.
Collections: Singapore, Bukit Timah, Corner s.n. 8 Dec. 1929; Choa Chu Kang, Corner s.n. Aug. 1929 (spores 5-7 x 3-3.5 µm); A. Thompson s.n. Jan. 1958, on a stump of Cassia siamea (?as a root parasite). - Sarawak, pr. Kuching, Corner s.n. 24 Jan. 1959). - New Guinea, Okapa, Oct. 1960 (?collector). - Solomon Islands, Ysabel, Tetamba, Corner s.n. Sept. 1965; San Jorge, 27 Sept. 1965, RSS 1459, on a stump of Casuarina.
This seems to be a variable fungus in detail. It much resembles Lenzites elegans, which has cystidiiform hyphal ends in the hymenium (Corner 1987). I am not convinced that the two are really separable because the binding hyphae may be almost cystidiiform in some collections of Tr. lactinea. The pores vary in different collections 160-280, 200-350 and even up to 500 µm wide. Hyphal pegs were absent from the Sarawak collection. The origin and branching of the binding hyphae varies. The skeletal hyphae swell in potash in some collections but hardly at all in others. It seems that spores may be difficult to recover from dried material. Neither Cunningham nor Ryvarden were able to obtain them, and several of my collections were sterile.
Though not recorded from the American tropics, I collected a very similar fungus near Iquitos, Peru, in May 1948, which was unfortunately sterile. It differed in the way that the pileus became covered with a thin superficial hyaline crust 100200 µm thick on the pileus but up to 400 µm thick at its base; it was formed by the agglutination of the interwoven hyphal ends at the surface and the extension of this process outwards. The tubes became sublamellate to subgyrose or broke into irpicoid plates.
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