FUSCUS. CONTEXT BROWN. 



young soft, pubescent, at length with concentric raised, soft ridges, 

 often with an obtuse, inflated edge. Context color light brown 

 (ochraceous tawny). Pores minute, the tissue concolorous with the 

 context, but the mouths at first purplish, losing the color when old 

 and becoming brown. Spores hyaline, globose, 4-5 mic. Setae abun- 

 dant, large, projecting 16-20 mic. 



This is rather a frequent plant around Paris on the oak, and was 

 named by Persoon, who preserved several good specimens in his 

 herbarium. It was not included in Fries' works, hence the tradition 

 was lost in Europe, until I unearthed Persoon's specimens (cfr. Myc. 

 Notes, p. 470). There are, however, at Paris and Kew specimens 

 determined by Leveille as Fomes torulosus, and he had it right. It 

 had been rediscovered by Boudier and Quelet, who called it Fomes 

 fuscopurpureus and Fomes rubriporus. While it is not rare around 

 Paris, it not known in northern Europe nor as yet found in England. 

 In the United States but one collection has been made, viz., by C. W. 

 Edgerton, on live oak at New Orleans. (Cfr. Pol. Series, p. 48.) 

 I have it from Japan, and it will probably prove to be more common 

 in the tropics when the distribution is better known. 



ILLUSTRATIONS. Boudier Icones, t. 152, fine (as Fomes fuscopurpureus). 



SPECIMEN'S. Many from France. Outside of France, Tirol Bresad9la; Austiia. v. Hohnel; 

 and Portugal, E. Torrend. None from England. From United States, Louisiana, C. E. Edgerton. 

 only collection known (cfr. Pol. Ser. p. 48). Foreign, Japan, A. Yasuda; Madeira, Carlos A. de Menezes. 



FOMES CONCHATUS. Pileus usually thin, conchoid, with a 

 sulcate, brown surface. Context light brown. Pores minute, con- 

 colorous. Setae numerous, slender, with bases slightly thickened, 

 projecting 20-28 mic. Spores hyaline, globose, 4^-5 mic. 



This is a frequent species on various, frondose woods, both in 

 Europe and the United States. The microscopic features are similar 

 to those of Fomes pomaceus, but it can be distinguished by its general 

 shape. It is also close to Fomes torulosus, and sometimes hard to 

 distinguish, though Fomes torulosus has darker pore mouths and 

 darker, thicker setae. Fomes conchatus is usually a thin plant, and 

 not badly named. 



ILLUSTRATIONS. None published. Britzelmayr's cartoon is not worth considering, and 

 Quelet's colored caricature has no possible resemblance to it. 



SPECIMENS. Many in Europe and United States. 

 Compare Langloisii. 



Forms. 



FOMES SALICIXUS. Growing on willow, Fomes conchatus is usually 

 subresupinate, or with a thick, imperfect pileate development. The context colo'r 

 is also darker. The miscroscopic features are the same. It is a host variation and 

 difficult to clearly distinguish. The plant is more common on willow in Europe 

 than in the United States. 



c , . , ILLU ,STRATIONS. Karsten Icon. t. 1, fig. 5, is best. Fries t. 185 is too dark. Patouillard, 

 ng. 141, and Quelet t. 17, fig. 6, both too poor to cite. 



SPECIMENS. Many, mostly from Europe. 

 Compare loricatus. 



244 



