CONTEXT WHITE. 



the true Poria obducens is not a form of Fomes connatus. The cystidia with en- 

 crusted heads, about 10 mi;, thick, are abundant over the hymenium. 



ILLUSTRATIONS. Three excellent illustrations have been given of it, Boudier, t. 1, Fries 

 Icon. t. 185, and Gillet t. 465. 



SPECIMENS-^Europe, marfy; United States, many; Japan, A. Yasuda. 

 Compare Meliae, oxyporus, populinus, Secretani. 



Fig. 572. Fig. 573. 



Pore strata of Fomes connatus X 6. Pore mouths of Fomes annosus X 6. 



FOMES ANNOSUS. Pileus woody, usually thin, uneven, ir- 

 regular, with smooth, brown crust. Context white or pale yellowish, 

 drying yellowish, hard. Pores small, round, or elongated with thin 

 walls. The annual pore layers form LcF^gularly and separately over 

 those of the previous year, and the tubes are not continuous, as in 

 most other species of Fomes. Spores globose, hyaline, smooth, 4-5 

 mic. 



This is a common species both in Europe and the United States. 

 Usually on acerose wood. It rarely develops a perfect, regular pileus. 

 Often it is subresupinate, forming irregular masses about the roots of 

 acerose trees. I have rare collections from frondose wood. 



ILLUSTRATIONS. Brefeld, No. 8, t. 9 is so perfect it is not worth while citing others. This 

 is miscited by Saccardo as being Fomas roburneus. 



Compare irregularis, Gillotti, castaneus, contrarius, cryptarum, hypopolius, marginatus. 



FOMES CUNEATUS. Pileus narrow, ungulate, or wedge- 

 shape, with rugulose, ridged, brown surface, hardly a distinct crust. 

 Context white with a yellowish tinge, hard. Pores minute, white, 

 with white mouths. Spores (?) globose, 3>^ mic., hyaline. 



Based on a collection from New Zealand at Kew, collected by 

 Rev. W. Colenso, on Fagus Solanderi. It is quite close to Fomes 



217 



