POLYPOREI. 285 



c. Caseosi. — PiUus cheesy, at first soft andjaicy, then arid fragile, 

 without a pellicle, zoneless ; jjores separating ; tufts sessile on 

 stems of trees, commonly dimidiate, but in a hm^izontal sitiudion 

 expanded on all sides, central, at first evolved from a shapeless 

 tubercle into numerous pileoli ; acid ; growing in spring and 

 summer, soon decaying, 



24. P. stilphureus, Fr. (p. 124) ; 1-2 ft. ; pilei 8 in. 

 Epping Forest. 



25. P. imbricatus, Fr.; in many csespitose layers, fibrous- 

 cheesy, at length pale and dividing ; pileoli imbricated, 

 lobed, opaque, yellowish-tawny, margin pallid, slightly 

 zoned ; pores small, round, pallid dingy-yellow. — Bull. 6, 

 418. 



On trunks. Rare. Epping Forest. 



26. P. Herbergii, Roslk. ; ceespitose, rather corky ; pileoli 

 imbricated, bright bay, sulphury about margin ; pores laby- 

 rinthiform, unequal, torn and toothed, pale cinereous. — 

 Rostk. xxix. t. 18. 



On trunks. Edinburgh Fungus Show. 



27. P. alligatus, Fr. (p. 241). 



D. SuBEROsi. — Pileus corky or coriaceous, persistent, tough, substance 

 floccose, somewhat soft, suitable for tiruler ; p>ores adnate ; tufts 

 someichat sessile, lateral or central, according to situation; 

 pileoli drawn together, free at base, not effused ; on trunks 

 close to the ground; not edible. 



28. P. heteroelitus, Fr. (p. 241). 



29. P. salignus, Fr. (p. 241). 



