Rev. M. J. Berkeley on Exotic Fungi. 389 



hard. Pileus thin, sometimes papillose, brown-blood-coloured, 

 at length pale, effused at the base ; pores extremely minute, 

 pale, with a brownish tinge. Very like P. igniarius. Pileus 

 effuso-reflexed, rather thin, zoneless, tuberculated, smooth, 

 margin subacute, brown-blood-coloured, 3 — 4 inches broad. 

 Mauritius, Mr. Telfair. Of this I have seen no specimens. 



27. P. (Apus. Perenn.) marginatus, Fr. On birch. North 

 America. Dr. Richardson. 



28. P. (Apus. Perenn.) fraxineus, Fr. On ash. North Ame- 

 rica. Dr. Richardson. 



29. P. (Apus. Perenn.) hydnoides, Fr. Pol. ur sinus, P. vul- 

 pinus, Link in Berl. Mag. 



Mauritius, Mr. Telfair. St. Vincent's, Rev. L. Guilding, 

 Demerara, Mr. Parker. The hymenium of this species varies 

 very much. The pores are sometimes close and angular with 

 thin dissepiments ; sometimes they are perfectly round and 

 distant as represented by Bosc under Bol. hydnatinus, with 

 the dissepiments thicker in consequence of the cellular sub- 

 stance of the fungus beginning to grow again after the perfec- 

 tion of the hymenium, and thus partially obliterating the 

 pores. There is a triquetrous variety from Brazil. 



30. P. (Apus. Perenn.) fibrosus, Hook, in Kunth. Syn. vol. i. 

 p. 10. sub Boleto. Subreniform, somewhat lobed, undulated. 

 Pileus brown shaded with reddish-grey, zoned, clothed with 

 scattered branched concentrically disposed fibres, sericeous 

 beneath ; margin very thin, acute, fimbriated ; pores minute, 

 subangular, umber ; dissepiments very thin. Pileus 1-f. of an 

 inch long, 3^- broad, flattened, thin ; substance much softer 

 than in the last, which is hard and woody, ferruginous-umber. 

 Pores not stratose. Certainly distinct from the foregoing. 

 This is placed next to P. hydnoides on account of its close 

 affinity, but I doubt whether either is truly perennial. With 

 P. tenuis, Humboldt. Demerara, Mr. Parker. 



31. P. (Apus. Bienn.) gilvus, Fr. Suberoso-coriaceous. 

 Pileus reniform, obscurely zoned, rugoso-striate, subsericeous, 

 red grey ; substance rhubarb-coloured ; pores small, subfer- 

 ruginous. 



Var. scabro-rugosus, Berk. Imbricated; pileus dimidiate, 

 more or less zoned, radiato-rugose and coarsely scabrous, red- 



