CONTEXT WHITE OR PALE. PORES COLORED. 



POLYPORUS ELMERL Pileus thin, dimidiate, with ochraceous surface, no 

 distinct crust. Flesh very thin, 1-2 mm., white, brittle. Pores minute, round, 

 isabelline, darker than the flesh. Spores subglobose, 3>^-4 hyaline, with surface 

 minutely but distinctly rough. This is a rare species, only known from a few collec- 

 tions in the Philippines. The general appearance of the pores is that of Fomes 

 lignosus or nearer the color of Poria undata. The plant is much more closely related 

 to Polyporus zonalis than to others of this section. 



SECTION 89. THICK, UNGULATE PLANTS. 



POLYPORUS AMARUS. Pileus ungulate, often large, 10-20 

 cm., broad, 6-12 cm., thick. Surface pubescent when young, rimose 

 and chalky when old. Context pale yellowish, hard and brittle when 

 dry. Pores dark brown in dried specimens, 1-2 cm. long. Mouths 

 round, ]^-\ mm. When growing, the pores are yellow or greenish 

 yellow, turning reddish brown in drying. In the dried specimens they 

 are much darker in color than the context. Spores 5x8, elliptical, 

 hyaline, smooth. 



A western species that was named and described by Hedgcock. 

 We have drawn largely from the description. It is supposed to be the 

 cause of the "pin-rot" in the incense cedar of the Pacific coast. Dr. 

 Von Schrenk described this disease and named the fungus Polyporus 

 libocedrus, but did not describe it formally ; and he advises us the types 

 are destroyed. We therefore adopt Mr. Hedgcock's name, believing, 

 however, it would have been better had Hedgcock adopted Von 

 Schrenk's name. Mr. Long tells us he has noted the plant abundantly 

 in California, but he failed to send us any specimens. All we have is 

 a little slice of the type. 



SPECIMENS. California, Geo. S. Hedgcock, a slice of the type. 

 Compare libocedrus. 



SECTION 90. THIN PLANTS, SOMEWHAT GELATINOUS WHEN FRESH. 

 This (in part) forms the "genus" Gloeoporus. 



POLYPORUS DICHROUS. Pileus thin, dimidiate, usually 

 imbricate. Surface smooth, white, no crust. Flesh white, thin, firm. 

 Pores small, dark purplish brown, gelatinous. Spores allantoid, 

 1^x4-5, hyaline, curved. 



Polyporus dichrous is a very common species in the United 

 States and a rare one in Europe. It grows on frondose wood, imbricate, 

 and quite extensive. When fresh the pores are gelatinous, and can be 

 easily stripped away from the flesh. On this account the plant was 

 erected into a new genus called Gloeoporus, which is maintained by 

 various writers. When dried the gelatinous nature of the pores is not 

 so evident. While it is rare in Europe, the plants are the same as the 

 common American plant. In American tradition the plant has passed 

 as Polyporus (or Gloeoporus) conchoides, which is partly right but 



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