PORE FUNGI 



99 



roi.vsi'K'Trs 



Closrh' ri'latcd to I' o 1 \ \> o r u s, so closch- in fact that it is iinpossihle to draw 

 a sliarji line hrtwrfii tliriii. I'lu' ca\) is usually thinner and more papery, and the 



])()rcs (k'wlop from the hack to the i'(l,m'. 'I'hc cap is usualK' shclfdike, and so lou.i^h 

 as to he ol no \aluc as lood. i'hc name rclcrs to the man\' ]M)res. 



Key to the Species 



1. ("ap white, zoneless 



_'. ("ap with distinct conct'niric zones 



a. ('ap main -colored 



1). ( "ap white or w hit ish 



P. versicolor 

 P. iiirsiitiis 



Fl(;i_KK ()i. Poi.Vl'oRU.S SLLPHUREUS 



Polystictus pergamenus Paper Polystictus 



Cap _'S cm. wide, white or whitish, (low nv or siuooth. leathery or papery, 

 rigid, often conccaitrically furrowed, but not zoned, shelf-like and imbricated: pores 

 whitish or u;ravish. tinelv toothed. I'he name refers to the pajierv texture. 



\'er_\' connnon on trunks and stuiu|is. 



Polystictus versicolor Rainbow Polystictus 



("aji 2-10 cm. wide, extremely yariahle in color, di.stinctly zoned, with different 

 colors, vehety or silkw leathery, denseh imbricated, shelf-like; pores small, round, 

 torn, white to gray or yellowish. The name refers to the many colors of the cap. 



iM'erywhere on stumps and logs. 



