POLYPORUS. 235 



P. Rostkovii, P. picipes, P. varius, and P. elegans, the present 

 species varies in the pileus being minutely flocculose at 

 first. In other words, P. melanopus is known by the floc- 

 culose pileus when young and the minute pores. 



Polyporus Rostkovii. Fr. 



Pilei 4-6 in. across, pliant, several often connate at the 

 base of their stems, infundibuliform, smooth, even, smoke- 

 colour, or sometimes tinged tan-colour; pores short, de- 

 current, large, angular, edges of dissepiments toothed, white, 

 then dingy and yellowish; stem 36 in. long, up to 1 in. 

 thick, excentric, thickened at the base, reticulated by the 

 rudimentary decurrent tubes, abruptly black ; spores almost 

 colourless, elongato-elliptical, 14-16 x 5-6 /u.. 



Polyporus Eostkovii, Fries, Epicr., p. 439 ; Stev., Brit. Fung., 

 p. 191. 



On trunks of ash, &c., also on stumps. Allied to P. squamosus, 

 which it almost equals in size, differs in the usually longer 

 stem, which is reticulated by the decurrent pores on the 

 under side. Several stems usually connate at the base; 

 pileus not scaly. Pores elongato-radiate, 2-4 mm. long. 



Polyporus picipes. Fr. 



Pileus 24 in. across, expanded, more or less depressed at 

 the disc or laterally, margin entire or lobed, tough then 

 rigid, even, smooth, yellowish with the disc chestnut, or 

 altogether chestnut, flesh white, 2-3 lines thick, margin 

 thin; stem --! in. long, \~^ in. thick, subequal, firm, 

 varying from almost central, through excentric, to lateral, at 

 first velvety, then naked and dotted, black up to the pores ; 

 pores about ^ mm. across, rounded, short, decurrent, white 

 then pallid or yellowish; spores minute, subglobose 3 '5-4 p.. 



Polyporus picipes, Fries, Hym. Eur., p. 534 ; Stev., Brit. 

 Fung., p. 191. 



On trunks, especially willow. 



Imbricated, smell rather sweet, flesh white. Pileus 

 depressed behind, commonly emarginate, infundibuliforra, 

 with lobes all round the margin. Colour pallid, becoming 

 chestnut; commonly livid-yellow with the disc chestnut. 

 (Fries.) 



Distinguished from P. varius by the even pileus and 

 velvety stem. 



