270 THELEPHOREI. 



Stereum. 10. S. avellanum Fr. — Coriaceous, hard. Pileus dingy, effused 



and, as well as the obtuse, free, narrowly reflexed, date-brown 

 margin > villous. Hymenium even, velvety then pruinate and 

 becoming smooth, pale-ferruginous (here and there bleeding). 



In many respects it approaches S. rugosum, but is certainly very different. 

 Colour not yellowish. 



On bark and wood, especially hazel. Appin. 



Name — Corylus avellana, hazel. Fr. Hym. Eur. p. 642. S. Mycol. Scot, 

 n. 862. Theleph. Fr. Syst. Myc. i. p. 442. Berk. Eng. Ft. v. p. 167. 



■*** Woody, perennial, scarcely reflexed, but marginate, &c. 



11. S. frustulosum Fr. — Date-brown-blackish, woody, resupi- 

 nate, tubercular, crowded and as if confluent, then broken up into 



fragments, smooth beneath and at the obsoletely marginate 

 circumference. Hymenium convex, cinnamon becoming pale, 

 pruinose. 



Easily distinguished by the colours, and by its thick, very hard, woody sub- 

 stance. Hymenium when perfect facing the ground, at first pruinate, when 

 fertile pulverulent with the cinnamon spores ; when turned to the light it 

 becomes sterile, pale, denuded. 



On hard oak wood. South of England. 



Spores ellipsoid-sphaeroid, hyaline 4-5 x 3-4 mk. K. Name— frustum, a 

 piece. From its being broken up into fragments. Fr. Hym. Eur. p. 643. 

 B. & Br. n. 1300. Theleph. Fr. Syst. Myc. i. p. 445. Elench. p. 191. 



*■*** Rigid^ the simple hymenimn prui?iose. 



12. S. rugosum Fr. — Corky, rigid. Pileus date-brown, effused 

 and shortly reflexed, obtusely marginate, at length smooth. Hy- 

 menium unpolished, pruinose, somewhat bleeding when bruised. 



A. Hymenium yellowish. B. Hymenium cinereous-livid. Varying very 

 much, even cup-shaped. 



On stumps, &c. Very common. Jan.-Dec. 



Name— ruga, a wrinkle. Fr. Hym. Eur. p. 643. Berk. Out. p. 271. C. 

 Hbk. 11. 914. S. Mycol. Scot. n. 863. 



Var. lauro-cerasi Berk. On laurel. S. Mycol. Scot. n. 863. Theleph. 

 Berk. Eng. Ft. v. p. 173. 



13. S. pini Fr. — Pallid, coriaceo - cartilaginous, resupinate, 

 adnate in the form of a shield, somewhat marginate, smooth 

 beneath, at le?igth bullate. Hymenium purplish -flesh -colour, 

 becoming fuscous, pruinose. 



The primary shields are minute, crowded, but already free, never aggluti- 

 nated or waxy. 



