SPORES HYALINE. 



. 



SPECIMENS. Colorado, C. H. Demetrio, E. Bethel, E. Bartholomew, L. O. Overholts; Mon- 

 tana, James R. Weir; Utah, A. O. Garrett. Since this has been in type, we have received a speci- 

 men from Dr. C. H. Kauffman, collected in Michigan. 



POLYPORUS AURANTIACUS. Pileus orange with rough, 

 fibrillose surface, no crust. Context bright orange, soft, spongy, thin. 

 Pores medium, soft, irregular, with unequal mouths, disposed to split. 

 Color of tissue, pale orange. Spores hyaline, 3x5, smooth. 



This is a rather rare plant in the northern United States, usually 

 on hemlock wood. We have collections, however, on birch and maple. 

 It is well named from its bright, orange color. It occurs in Finland, 

 but is apparently very rare in Europe, for all the specimens in the 

 museums are Karsten's exsiccatae, No. 311, under the nameTrametes 

 fibrillosus. This is a prior name, but there is something crooked in its 

 history. Karsten described the plant in 1859 (not 1882, as misstated) 

 as having context "fulvus," and admitted (1876) that it was the same 

 as Polyporus vulpinus, a brown species. He distributed (Exsic. 311) 

 an orange plant under this name, but whether he substituted another 

 species or whether he described a bright, orange plant as being "dark 

 ferruginous, fulvus," we do not know; but in neither case has his 

 work much claim. 



It occurs also in Japan. A collection from Ikeno was misreferred 

 by Hennings to Polyporus Shiraianus. This is the only Japanese col- 

 lection known. 



SPECIMENS. We have collections from Massachusetts, Idaho, Vermont, Newfoundland, 

 Michigan, Canada, and Washington. 



Compare crocicolor, fibrillosus. 



SECTION 93. CONTEXT VINACEOUS OR PURPLE. 



POLYPORUS DURUS Pileus sessile, thin (4x6x1 cm.), 

 drying hard and rigid, and usually incurved. Color of dried specimens 

 very dark, almost black with purplish tinge. Surface smooth, dull, no 

 distinct crust. Context hard, rigid, 2-4 mm., dark brown with faint 

 purplish tinge. Pores minute, hard, 3-5 mm. long, with dark, atro- 

 purpureus mouths and tissue. Hymenial cells hyaline. Spores 

 globose, hyaline, 3 mic. 



This is not an unusual species in the East, but does not occur in 

 American tropics. We have seen it from Africa, Java, Philippines, 

 Australia, Ceylon. We made one abundant collection in Samoa. The 

 color of the dried plant, dull, violet black of Ridgway, would ordinarily 

 be called atropurpureus. We do not remember the color of the fresh 

 plant, but our impression is that it was more brown. We do remem- 

 ber that we associated it with Polyporus gilvus, which we would not 

 have done had the color been that of the dried specimens now. Jung- 

 huhn named it from Java. Berkeley called it Polyporus cartilagineus 

 (a senseless name) and also Polyporus Testudo. 



SPECIMENS. Madagascar, Henri Perrier de la Bathie; Samoa, C. G. L.; Philippines, E. D. 

 Merrill; Ceylon, T. Petch. 



Compare cartilagineus, Testudo, also Pomes melanoporoides, and Fomes ponderosus. 



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