374 BRITISH FUNGI 



P. adustiis. — Effuso-reflexed, imbricate, or entirely resupinate, 

 thin, limp, downy, pale grey, obsoletely zoned, wrinkled ; pores 

 shallow, minute, round, soon dingy grey, blackish when dry. 



Differs from P. fumosus in thinner substance, and in the pores 

 becoming blackish in drying. 



On trunks, stumps, etc. 



P. aniorphus. — Effuso-reflexed or resupinate, thin, pliant, in- 

 curved and rigid when dry, whitish, minutely velvety ; pores 

 small, golden yellow. 



On rotten pine wood, or running over pine leaves. 



P. epileucus.—Pileus horizontal, 3-5 in. across, i-2-| in. thick, 

 soft, then firm, whitish, rugged with downy projections, flesh 

 whitish ; tubes 2-3 lines long, pores minute, round, ochraceous tan. 



Simple, large, suborbicular, concave below. 



On trunks and stumps. 



P. alutaceus. — Pileus 1-2 in. across, reniform, fleshy, minutely 

 velvety, pale dingy ochraceous, flesh similar in colour ; tubes 

 rather long, pores minute, pale ochre. 



Soft, fragile, several pilei often growing together. 



On trunks and stumps. 



P. chioneus. — Pileus 1-2 in. across, thick and fleshy, soft, smooth, 

 zoneless, often imbricated, white ; pores minute, round, equal, white. 



Watery white when moist. Distinguished amongst the soft, 

 entirely white species by the absence of bluish or rusty stains when 

 bruised. 



On trunks and stumps of conifers, etc. 



P. cerebrinus. — Resupinate, thickish, about i in. across, snow- 

 white, tomentose, edge notched ; pores large, rounded, with thick, 

 entire walls. 



Looks hke a portion of a white brain. 



On fir. 



P. ccBsius. — Resupinate or horizontal, 1-3 in. across, soft, silky, 

 white, here and there tinged with blue ; pores minute, wavy, 

 becoming torn into irregular teeth. 



Altogether white, becoming bluish when touched. 



On dead trunks, especially pine. 



P. spumeus. — ^Whitish, 3-4 in. across, fleshy, spongy, rugged and 

 hispid, edge incurved, base stem-hke ; pores minute, rounded, 

 edges entire. 



Oozing out in a soft mass which hardens in a day, and under 

 favourable conditions becomes hairy. 



On living or dead trunks of beech, birch, etc. 



P. ladeus. — White, 1-2 in. across, triangular, fibrous, fleshy, 

 fragile, downy, the incurved edge sharp ; pores medium-sized, 

 wavy and soon torn. 



