POLYPOKKl. 241 



On trunks of trees, etc. Rare. Kew. Coed Coch, etc. 

 Surface of the pileus rough with little granules or scales. 

 Extremely handsome. 



18. P. sulfureus, Fr. ; imbricated, of a cheesy consistence, 

 soon growing pale and cracking; pilei very broad, undulated, 

 nearly smooth, ruddy yellow ; pores minute, plane, sulphur- 

 coloured, at length torn. (Plate 16, fig. 3.) — Huss. i. t. 46. 



On trunks of various trees. Common. Stem generally 

 obsolete. When dry, often covered with little crystals. 



19. P. alligatus, Fr. ; csespitose, of a fibrous, cheesy con- 

 sistence, rigid, but brittle ; pilei imbricated, unequal, zoneless, 

 villous, tan-coloured, inclining to red; pores minute, soft, 

 white, easily obliterated by flocci. — Sow. t. 422. 



At the base of trunks. Rare. I am not convinced that 

 Fries and Sowerljy have the same species in view. 



20. P. heteroclitus, Fr.; csespitose, coriaceous; pilei sessile, 

 expanded on all sides from a common radical tubercle, lobcd, 

 villous, zoneless, orange; pores irregular and elongated, dull 

 golden-yellow.— J5o/^. t. 164. 



On the ground, imder oaks. I am not acquainted with this 

 species. 



21. P. salignus, Fr.; imbricato-csespitose, coriaceous, but 

 soft ; pilei dimidiate, dilated, kidney-shaped, dirty-white, 

 clothed with depressed down, swollen, sulcato-depressed about 

 the somewhat lobcd margin ; pores thin, crowded, elongated, 

 flexuous, intricate, white. — Bolt. t. 78. 



On willows. Not uncommon. Edinburgh, 7>. GreviUe, etc. 



4. Sfemless. 

 * Anodeemei. — Pileus at first juicy. Cuticle iwne. 



22. P. chioneus, Fr. ; white ; pileus fleshy, soft, zoneless, 

 at length even and smooth, somewhat stretched out behind ; 



