POLYPORUS. 251 



behind, Pores short, equal, obtuse, bright yellow, covered 

 with white powder when young. (Fries.) 



Polyporus epileucus. Fr. 



Pileus horizontal, pulvinate, 3-5 in. broad, 1-2^ in. thick, 

 sc'ft and of a cheesy texture, then firm, whitish, rugged with 

 villose projections, flesh whitish ; tubes 2-3 lines long, pores 

 minute, round, pale ochraceous-tan colour, i mm diameter. 



Polyporus epileucus, Fr., Epicr., p. 452 ; Stev., Brit. Fung., 

 p. 196. 



On trunks and stumps. 



Simple, large, semiorbicular, concave below, flesh not 

 fibrous, scarcely zoned, pores at first scarcely distinguishable, 

 tubes minute, up to 18 mm. long. (Fries.) 



Polyporus alutaceus. Fr. 



Pileus 1-2 in. across, | in. thick, horizontal, reniform, 

 fleshy, becoming tough, pileus minutely velvety, pale dingy 

 ochraceous, flesh similar in colour, soft, fibrous, vaguely 

 zoned, margin acute ; tubes 3-4 mm. long, pores roundish, 

 minute, about \ mm. across ; spores subglobose, with a 

 slight ochraceous tinge, 4 fx. diameter. 



Polyporus alutaceus, Fries, Syst. Myc. i. p. 36. ; Stev., 

 Brit. Fung., p. 197. 



On beech and pine trunks, stumps, &c. Substance obso- 

 letely zoned, soft, fragile. Pilei often connate, triquetrous, 

 reniform, obtuse, 1 in. broad and thick. Pores quite entire, 

 forming long tubes. 



Somewhat imbricated, sometimes convex, at others 

 flattened, occasionally hairy and rugose, plane beneath. 

 (Fries.) 



Tubes about f in. long. (Stev.) 



Polyporus chioneus. Fr. 



Pileus 1-2 in. across, thick and fleshy, soft, becoming even, 

 smooth, zoneless, often extended behind, also imbricated, 

 every part white ; tubes short, pores minute, round, equal, 

 the dissepiments quite entire. 



Polyporus chioneus, Fries, Syst. Myc. i. p. 359 ; Stev., 

 Brit. Fung., p. 197. 



On trunks and stumps of pine, birch, &c. Soft when 

 growing, becoming rigid when dry, hyaline-white when 



