SECTION 59. CONTEXT ISABELLIXE. 



FOMES FUSCO- FALLENS. Pileus ungulate or applanate; 

 with hard, dark, rough crust. Context hard. Pores minute, round, 

 2-3 cm. long, tissue isabelline near the mouths, but darker fuliginous 

 above. Cystidia, none. Spores globose, 4-5 mic., hyaline (or seem- 

 ingly very pale color). 



This was received from the Philippines Xos. 3693 and 11352, 

 named in mss. by Bresadola. It was not published in either of his 

 Philippine lists. The tendency of the pore tissue to become darker 

 is a feature of Fomes hornodermus. and the two species are related 

 in other respects. 



SECTION 67. BICOLORIS. 



FOMES GRAFFI I. Pileus applanate, sessile, (3 cm. thick) 

 with a hard, rugulose, brown crust. Context pale isabelline, yellow- 

 when moist, hard, ligneous. Pores dark brown, minute, 1^-2 cm. 

 long, hard, with brown pore mouths. Spores globose, deep colored, 

 14 mic., smooth. 



This is the third Fomes that has reached me belonging to the 

 peculiar section with pale context and dark pores. All three of them 

 in macroscopic characters^ are about the same, and to the eye alone 

 would be held as the same. But the spores are very different as 

 follows: Fomes sculpturatus, Madagascar Spores elliptical, 14 x 20, 

 pale colored, with sculptured surface. Fomes mirabilis Straits Set- 

 tlements Spores small, globose, 7-8 mic., pale colored. Fomes 

 Graffii, Philippines Spores large, 14 mic., globose, deep colored. 

 We have a feeling that it is a spore variation of same species, but we 

 can not prove it and we would not assert it. 



Fomes Graffii reached me labeled "Ganoderma bataanense" Xo. 

 19097, province of Bataan, collected by P. W. Graff. This was 

 originally published as Amaurodermus, and, in my opinion, should 

 have been so left. It was compiled in Saccardo as Ganodermus. I 

 do not know Amaurodermus bataanensis excepting by description, 

 which differs from this specimen in almost every point, and, besides, 

 it is surely not a Fomes. 



SECTION 69. CONTEXT BROWN.. SPORES HYALINE. SETAE ABSENT. 



FOMES YASUDAI (Fig. 606). Pileus ungulate, (3-4 inches) 

 with smooth, uneven, annular, sulcate, light brown crust. Context 

 light sagal brown, scanty. Pores very minute, in annual layers 2-3 

 mm. thick. Pore tissue cinnamon, paler than the context. Pores 

 subglobose, hyaline, 3>-4 mic. Setae none. 



Based on a specimen (No. 8) from A. Yasuda, Sendai, Japan. 

 Strongly marked by the narrow, annular, sulcate rings of the surface 

 caused by the overlapping annual growths. There are a few narrow 

 layers of context interposed between some of the pore layers, and as 

 these are absent between most of the pore layers, it is due no doubt 

 to seasonal conditions, and probably represent wet seasons. As to 



272 



