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 Add this item to the list  Polyporus spatulatus (Jungh.) Figure 12
   
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Description type:Non-original description 
Description:Polyporus spatulatus (Jungh.) Figure 12
Laschia spatulata Jungh., Fl. Crypt. Java (1838) 75. Favolus spatulatus (Jungh.) Lév., Annls Sci. nat. bot., ser. 3, 2 (1844) 203; Bresadola, Ann. mycol. 8 (1910) 587; Boedijn, Bull. Jard. bot. Buitenz., ser. 3, 16 (1940) 397; Imazeki (1940) 109 f. 22; Ryvarden and Johansen, Prel. Polyp. Fl. E. Africa (1980) 331.
Tyromyces spatulatus (Jungh.) G.H. Cunningham, Polyp. N.Z. (1965) 127.
Polyporus vibecinus Fr. (1848); Reid, Contr. Bolus Herb. n. 7 (1975) 66.
Pileus -5 cm in radius, -7.5 cm wide, pleuropodal, occasionally mesopodal, spathulate to flabelliform, becoming lobed and foliaceous at the margin, glabrous when moist, drying finely spiculose-subvillous towards the base, white then pale fuscous bistre and finely fuscous streaked, becoming pallid white with innate fuscous streaks towards the margin, drying fuscous; margin fimbriate-dentate with processes - -0.6 mm long, fuscous, then expanded, entire, white. Stem 2-8 x 25 mm, lateral, minutely, spiculose-villouse, base often subdiscoid, pale ochraceous, then white. Tubes 1-2 mm long, decurrent, often deeply; pores 90-200 µm wide, small, angular, becoming 1-2 x 0.3 mm in old specimens, with dentate to irpicoid dissepiments 35100 µm thick, even inclining to labyrinthiform, drab white, hyphal pegs none. Flesh 0.5-1.5 mm thick, coriaceous, white.
On fallen trunks and branches in the forest, often densely imbricate. Palaeotropics; Malesia, frequent in lowland and mountain forest.
Spores 5-7 x 2.3-2.7(-3) µm, or 4-5 x 2-2.3 µm (RSS 1468), 1-2 guttulate, not dextrinoid. Basidia 13-17 x 4-5 µm (RSS 1468). Cystidia none. Hymenium not thickening; subhymenium slight; pore-edges sterile.
Hyphae not dextrinoid. Generative hyphae 2-4 µm wide, without clamps, with short cells 15-25 µm long at the margin of the pileus soon disappearing from the flesh. Skeletal cells 40-400 x 3-7 µm, walls 1.5 µm thick; binding processes -300 µm long, not or once furcate, 1 subapical, 1 sub-basal, 0(-1) lateral. Dissepiments not agglutinated.
Surface of pileus with a thin sterile hymenium; conical processes -200 µm high, composed of generative and skeletal hyphae, often with sterile basidia on the sides near the base. Surface of stem similar but with more irregular processes -0.7(-1) mm high and often as minute flanges or imperfect dissepiments.
Collections: Sumatra, Brastagi, 10 Sept. 1931, Corner 865. - New Guinea, Oomsis, 28 Sept. 1960; Corner s.n. - Solomon Islands, Guadalcanal, Gallego, 2 July 1965, RSS 514; Ysabel, Tetamba, 28 Sept. 1965, RSS 1468; Jagi Island, 6 June 1964, s.n.
This is distinguished among species without clamps by the usually pleuropodal pileus, minute decurrent pores, and small spores. The fruit-bodies dry dark fuscous brown. It seems that the pores may enlarge considerably as the fruit-body ages; yet the following var. major has pores of medium and fairly constant size.
According to Ryvarden the spores are 6-8.5 x 2-3 µm and larger than in P. grammocephalus, which I am unable to confirm. Reid gives the spores of P. vibecinus as 4.2-6.2 x 2-2.2(-2.5) µm. De and Roy (1981) give the spores of P. grammocephalus as 5-7.5 x 2.4-3.2 µm, which is intermediate. In fact the lack of clamps seems to be the distinction from P. grammocephalus.
 
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