CONTEXT AND PORES COLORED. 



stuppeus is more closely allied to Polyporus fumosus than to this section. The dark 

 color of context may be only a color change, in which event it would go with fumosus. 



POLYPORUS SUBRADIATUS. Pileus unicolorous, sessile, 

 rigid (3x4x^2 cm.), with thin margin. Surface velvety, becoming 

 glabrous, rugulose, no distinct crust. Flesh hard, firm, yellowish 

 brown (antique brown). Pores minute, concolorous. Setae, none. 

 Spores hyaline, 3 x 5-6, smooth. 



We have two collections of this from Professor A. Yasuda (No. 49 

 and 196). To the eye it is similar to Polyporus radiatus, same general 

 size, color, texture, but is quite glabrous. It differs by absence of setae 

 and narrower spores. 



POLYPORUS PSEUDOFRUTICUM. Pileus dimidiate, ungulate. Context 

 dual, the old hard and ligneous, the young soft and spongy. Surface soft. Color of 

 old context cinnamon brown, of the new growth, yellow ocher. Setae, none. Spores 

 2^2 x 3^4, hyaline, smooth. 



The old context is harder, but the young is of the same spongy nature as Poly- 

 porus fruticum. Were it not for the hyaline spores, it would be referred to fruticum. 

 This is probably a better Fomes, and so is Polyporus fruticum at times. Notwith- 

 standing the discrepancies of spore colors, I think it is better classed as a form of 

 Polyporus fruticum. Specimen from Rev. C. Torrend, Bahia, Brazil. 



SECTION 96. CONTEXT BROWN. SETAE PRESENT. 



POLYPORUS GILVUS. Pileus sessile, applanate, thin, y 2 -\y z 

 cm., often imbricate. Surface brown, even, usually slightly rugulose. 

 Context hard, firm, of the growing plant often bright gilvus (yellow 

 ocher), varying to brown (cinnamon brown) when old. Ordinarily the 

 context is more brown than yellow. Pores are small, round, 3-10 mm. 

 long, with brown tissue and mouth. Setae abundant, slender, sharp, 

 projecting 12-16 mic. Spores hyaline, 3>^x4-5, smooth. 



Polyporus gilvus is a most abundant plant in the United States, where it was 

 named at an early date by Schweinitz. It grows on all kinds of frondose wood, but 

 has a special liking for beech. Usually the old beech logs are densely covered with 

 it. It would seem, from the abundant specimens that have reached Europe, that it 

 is equally common in the West Indies, South America, Pacific Islands, Australia, 

 East Indies, Japan, Philippines, India, and seems particularly common in Africa. 

 It is strangely rare in Europe, and we have never seen but two European collections. 

 One we have from Rev. L. Navas, Spain, the other, collected by Quelet, is in Fries' 

 herbarium. The occurrence of the plant in England is based on an old tradition, not 

 authentic at the start, and not at all probable. 



In the United States, mycologists have always correctly known the plant. 

 Not one of them ever discovered that it was a "new species." That, however, was 

 reserved for Cooke, who, we believe, was the only one to discover Polyporus gilvus 

 to be a new species in its native haunts. Ellis got mixed on one of its forms. It has 

 not been so fortunate elsewhere, however. From the tropics and foreign countries 

 Polyporus gilvus, and its forms, has been named about twenty times, and few new 

 species hunters of any prominence have failed to find it. It was an especial favorite 

 with Berkeley and Leveille, each having discovered and named it five different times. 

 Cooke impartially distributed those "species" through Fomes, Polyporus, Polystictus, 



346 



