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 Add this item to the list  Phellinus glaucescens (Petch) Ryv.
Page number:97 
Description type:Non-original description 
Description:Phellinus glaucescens (Petch) Ryv.
Norw. J. Bot. 19 (1972) 234; Ryvarden and Johansen (1980) 169; Larsen and Lombard, Mycologia 80 (1988) 74.
Poria glaucescens Petch, Ann. r. bot. Gdn Peradeniya 6 (1916) 139.
Resupinate in patches up to 50 cm wide, closely adnate, perennial, not forming pilei; margin minutely velutinate, rather vaguely determinate, not spreading widely, dirty ochraceous, the old margin thickened on oblique and vertical surfaces and with a slight agglutinated dull fuscous crust with a few rudimentary pores on the underside. Tubes -30 mm long in indistinct layers 1-2.5 mm thick, without intervening layers of flesh, dense, woody, date-brown umber becoming dull dark brown, old tubes stuffed with pallid white mycelium; pores 70-100(-120) µm wide, dissepiments 40-150 µm thick, entire, velutinate, concolorous with the tubes. Flesh less than 0.1 mm thick, (0.1-0.2 mm in the type), practically none, the tubes of old fruitbodies appearing seated on the wood. Smell on drying somewhat of caraway seeds.
On dead fallen and standing trunks, often living, in the forest, often in long sheets. Malay Peninsula, Ceylon.
Spores 3.5-4.5 x 3-3.5 µm, white in the mass, old spores in the tubes yellowish, broadly ellipsoid, smooth thin-walled, with 1 gutta 2-2.5 µm wide. Setae 12-28 x 511 µm or 12-22 x 5-8 µm, strongly ventricose, acute, straight or more less arcuate, rarely subhamate, thick-walled, abundant but becoming sparse in later formed tubes. Hyphae d5, without clamps; skeletals in the flesh of the type 3-5 µm wide; in the dissepiments 2.5-3(-3.5) µm wide, mainly longitudinal, with thick yellow brown walls and simple obtuse ends, becoming slightly agglutinated; generative hyphae 1.5-2.5 µm wide; in the very thin flesh, the hyphae as in the dissepiments but interwoven. Causing a pocket-rot of wood with narrow and rather elongate cavities filled with whitish mycelium
Collections: Malaya, Kelantan, Ketil River, Corner s.n. 4 June 1931, forming bosses c. 15 cm wide, 4-5 m above ground, on living trunks of Dipterocarpus oblongifolius; Pahang, Tembeling, Corner s.n. 26 May 1931 (setae rather narrow); Pahang, Cheka River, Corner s.n. 13 Nov. 1930; Selangor, Kanching Forest, leg. T.F. Chipp 18 Jan. 1920 (setae 12-22 x 5-8 xm); Johore, Ulu Tiram, Corner s.n. 26 Nov. 1932. - Singapore, Economic Garden, leg. T.F. Chipp, Sing. F.N. 4836; Reservoir Jungle, Corner s.n. 1929-1931 (setae 12-22 x 5-8 µm); Tanglin, leg. T.F. Chipp, Sing. F.N. 4811, on living Terminalia catappa; Botanic Gardens. leg. F. Flippance, Sing F.N. 5921, and Blakang Mati, leg. T.F. Chipp, Sing. F.N. 5476 (both collections with narrow setae 20-30 x 5-9 µm and skeletals 2.5-4 µm). - Ceylon, Herb. Peradeniya 3653, Hakgala, May 1913 (type-collection).
There is no doubt that this is a resupinate species without tendency to form pilei. Thus, on the trunk on which the fungus was growing in the Reservoir Jungle, Singapore, during 1929-1931, there were also fruit-bodies of Ph. setulosus var. longisetosus, but the two never intergraded. The collection from Kelantan consisted of resupinate fruit-bodies on the canker-like bosses of the trunk in which the mycelium caused the pocket-rot; I examined hundreds of the dipterocarp trees which lined closely the river-banks and found but one tree infected. In the case of the collection from Ulu Tiram, Johore, the fuit-bodies grew on the underside of subcylindric woody bosses, up to 10 x 5-8 cm, which projected from the bare decorticated trunk, to 10 m high, of a small tree which was fluted, not buttressed; there were about a hundred of these bosses almost from ground level and all with the pocketrot, and it appeared as if a multiple infection had killed the tree; the fruit-bodies grew on no other part of the trunk, and the bosses gave to the resupinate fruitbodies an ungulate appearance. Concerning the two Singapore collections, Sing. F.N. 5476 and 5921, I was unable to distinguish them from a resupinate state of Ph. senex. Petch's original description was strangely erroneous in several ways. Thus, the glaucous nature was caused, as with with other xanthochroic polypores, by the fact that the old pores had ceased growing and had been covered by a thin blackish crust c. 150 µm thick from which a new set of tubes was just forming. I have been unable to follow the description given by Larsen and Lombard who found the skeletal hyphae to be 1-1.5 µm wide and narrower than the generative hyphae 1.5-2 µm wide. See, also, the note under Ph. ferrugineovelutinus
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