Poria POLYPORACE^ 359 



1624. P. subfuseoflavida Cooke (from the pale brownish-yellow 



colour ; snbfuscus, somewhat dusky, flcrridns, yellow) a c. 

 Sitb. thin, coriaceous, dry ; marg. thin, byssoid, determinate, 



white. Po. minute, irregular, white, then yellowish-brown or 



glancing white and grey-brown. 

 Broadly effused, confluent. Dead oak wood, planks, etc. 2 in. 



1625. P. viridans Cooke (from its pale seruginous colour ; virido, to 



become green) a c. 

 Sub. thin. Po. minute, shallow, white, ivory or pale buff, then 



pale verdigris ; marg. pulverulento-tomentose. 

 Effused, crustaceo-adnate. Rotten wood ; rare. Sept. 2 in. Sometimes 



a mere thin, pale reruginous film without pores. 



1626. P. terrestris Cooke (from its terrestrial habit) a c. 



Sub. very thin ; marg. arachnoid flaxy, fugacious with a byssoid 

 white edge. Po. shallow, minute, angular, becoming smaller 

 and scattered towards the wide, barren marg., white, becoming 

 pale umber or faintly rufescent. 



Effused. Black earth, red clay, rotten wood ; uncommon. May-Nov. 4 in. 



1627. P. subgelatinosa Cooke (from the somewhat gelatinous 



subiculum) a b. 



Orbicular, forming small pulvinate masses with an obtuse raised 

 border, at first tomentose and pallid, becoming black and 

 subgelatinous. Po. somewhat large, others small, variable in 

 size, pale grey. 



On dead wood, on 1566. ig in. 



1628. P. medullapanis Cooke (from its colour like pith or bread ; 



medulla, pith, patris, bread) a b c. 

 Somewhat undulate, firm ; marg. barren, whitish, sometimes 



upturning and separating from matrix. T. somewhat long. 



Po. medium size. 

 Decayed branches, mulberry, oak, hornbeam, on the ground ; uncommon. 



Sept. -Feb. 4^ in. Sometimes in certain positions 4-6 stratose. 



1629. P. mueida Pers. (from its mucid substance) a c. 



Sub. somewhat thick, soft, elastic; marg. barren, indeterminate, 

 flaxy. Po. shallow, medium size, unequal, torn, white to 

 ochre-white. Myc. spreading and often forming small orbicular, 

 transparent, barren patches. 



Effused in long patches. Decayed fir. 3^ in. Thicker than 1634. 



1630. P. vitrea Pers. (from its shining glassy appearance as if wet ; 



vitrnm, glass) a c. 



Sub. somewhat thick. T. somewhat long, translucent, whitish. 

 Po. minute, entire, roundish, whitish, becoming buff-white or 

 vinous-buff-whitish. 



Broadly and unequally effused. Dead wood, fir, on the ground under beech ; 

 uncommon. Aug.-Mar. 3^ in. With the appearance of shining wax. 



