BASIDIOMYCETES 391 



Formed of numerous imbricated pilei forming clusters 

 several feet across ; stem short, much branched, springing 

 from a tuberous base ; pilei thin, fleshy, tough, then 

 coriaceous, dimidiate, flaccid, slightly zoned, rivulose, 

 depressed behind, bay-brown ; tubes very short, pores 

 minute, roundish, at length torn, pallid, becoming dark- 

 coloured when bruised. 



Polyporus sulphureus, Fries^ Sys/. Myc, i. p. 357. — 

 Horizontal, attached by a broad base, usually imbricated, 

 undulate, almost glabrous, yellow, pale flesh-colour, or 

 tinged red, 10-20 cm. across ; flesh thick, yellow, then 

 whitish, cheesy; pores up to 1*5 cm. long, pores minute, 

 plane, sulphur-colour ; spores elliptical, hyaline, slightly 

 papillose, 7-8 X 4-5 /x ; smell unpleasant. 



Polyporus dryadeus. Fries, SysL Myc, i. p. 374 (in part). 

 — Pileus 10-25 c^^- across, 6-10 cm. thick, semicircular, 

 sessile, horizontal, attached by a broad base, pulvinate, 

 fleshy, then corky, cuticle thin, soft, smooth, rugged, 

 becoming even, ferruginous, then brown, margin often 

 exuding drops of water ; flesh ferruginous, somewhat 

 zoned, rather velvety, fibrous when cut ; tubes 2-5 cm. 

 long, thin, soft, ferruginous, pores round, paler, about 

 J- mm. across ; spores colourless, elliptical, 5 X 3 /x. 



Polyporus hispidus. Fries, Sys^. Afyc, i. p. 362. — Pileus 

 sessile, attached laterally, horizontal, more or less convex, 

 compact, fleshy, rusty-brown, hispid, 10-18 cm. broad; 

 flesh spongy, ferruginous, formed of diverging fibres, 2-5 

 cm. thick ; tubes 2-3 cm. long, yellowish, then brown, but 

 paler than the pileus, pores minute, margin fimbriate, 

 inclined to separate, often exuding water in drops; spores 

 elliptic, oblong, orange-brown, 10x7 /x. 



