Section Tabacinus. 

 Polystictus tabacinus. 



NOTE 108. As we get this plant from various localities, we are becoming con- 

 vinced that it is not practical to distinguish Polystictus tabacinus from Polystictus iodinus. 

 We have exactly same plant in our Southern States. 



FOMES. 



Context color white. 

 Fomes hornodermus. 



Context color rose or latericeous. 

 Fomes perlevis. 



(cfr. Letter No. 39.) Mr. Henri Perrier de la Bathie sends this in abundance. 

 How this most peculiar species escaped being named until such a late date is a mystery. 



Fomes nontostus (Bresadola's determination as Fomes semitostus). 



I have compared these with the type at Kew and find it has same pores and context 

 color and texture, but the surface is different. In the type it is smooth, reddish brown, 

 and the name "half scorched" is not bad. In these specimens from Madagascar there 

 is no indication of this. The pale, sulcate surface is better called "nontostus." The type 

 of Fomes semitostus has practically no context. It is well developed in these specimens, 

 soft, punky, pinkish cinnamon. 



Context pale, pores darker. 

 Fomes sculpturatus. 



Since this plant has been named, we conclude that it is practically the same 

 species as Fomes mirabilis from Malay. The spores are very different. Globose, brown, 

 7-8 mic. smooth, punctate in Fomes mirabilis ; large, 14 x 20 mic. ovate, brown in Fomes 

 sculpturatus. We think perhaps that Fomes sculpturatus is the conidial spored form of the 

 Malay plant. It is curious, however, that in an ample sending from Henri Perrier de la 

 Bathie all had these same large spores. 



Context color brown, ferruginous or fulvous. 

 Fomes senex. 



A frequent species in the East with velutinate hymenium, pale spores, and setae 

 on the pores. We have heretofore called this plant Fomes Haskarlii, and Bresadola refers 

 it to Fomes Korthalsii both names of Leveille, and both doubtful, owing to confusion that 

 exists as to the types. We are convinced that it is Fomes senex in the original meaning 

 of Montagne (Juan Fernandez specimens, not the Cuban reference of Montagne), and, 

 owing to the doubt as to both of Leveille's names, we shall adopt the name Montagne gave 

 the plant. 



Fomes senex, the type form, is a species of wide distribution. There is an abundance 

 of it at Leiden, which was referred by the old Dutch mycologists to Fomes ferruginosus. 

 We have an ample collection from Dr. J. C. Koningsberger, Java. It has a rugulose sur- 

 face, very little context, and many layers of pores. 



Fomes velutinosus. 



NOTE 110. We believe this is entitled to a name and that it is different from 

 Fomes senex, to which we have heretofore referred it. It has the same context, color, 

 and setae, but differs in its surface, its texture, and its pore mouths. The surface is much 

 smoother, and often has a banded effect, such as has Polyporus licnoides (the type). The 

 context is softer and well developed. In Fomes senex there is very little context, and 

 it is harder and difficult to cut. The most marked difference is in the pore mouths, which 

 in Fomes velutinosus are more strongly velutinate and of a deeper color. The velutinate pore 

 mouths are caused by dense, colored hyphae, projecting 20 to 30 mic. 



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