204 FUNGUS-FLORA. 



scarious dissepiments at length collapsing ; spores colourless, 

 subglobose, minute, 3 x 2 p.. 



Polyporus hymenocystis, B. & Br., Ann. Nat. Hist., n. 1810 

 bis ; Stev., Brit. Fung., p. 220. 



On dead wood, Exceedingly thin, margin minutely 

 byssoid, in some places almost indeterminate, pores about 

 ;J mm, across, readily known by the large pores, collapsing 

 dissepiments, and especially the minute, subglobose spores. 



II. White, changing to some other colour when dry. 



Poria subfusco-flavida. Eost. 



Patches broadly effused and becoming confluent, thin, 

 coriaceous, dry, closely adnate, changing from white to 

 yellowish brown ; margin thin, byssoid, white, determinate ; 

 pores minute, irregular. 



On old dead oak wood, planks, &c. Extending for 8-12 

 in. The pores appear when viewed one way of a greyish- 

 brown, and the other white. (B. & Br.) 



Poria viridans. Berk. 



Effused, thin, crustaceo-adnate, at first white, becoming 

 pallid green when dry, margin tomentose; pores minute, 

 angular, dissepiments very thin ; spores, 4 /u, 2 5 /*. 



Polyporus viridans, Berk. & Br., n. 347 ; Stev., Brit. Fung., 

 p. 216. 



On rotten wood. Effused, forming patches a few inches 

 long, perfectly white at first, but in drying assuming a deli- 

 cate pale green, with a honey-like tinge in parts ; border 

 pulverulento-tomentose, very thin; pores minute, angular, 

 dissepiments thin. This pretty species has the habit of 

 P. vulgaris. (B. & Br.) 



Pores about ^ mm. across. 



Poria Renneyi. B. & Br. 



Subiculum rather thick, at first somewhat frothy, then 

 dry, white, changing to citron- yellow when dry; pores 

 white, scantily produced, elongated, dissepiments thin; 

 spores numerous, colourless, elliptical, minute, 3 x 1 ' 5 /x. 



Polyporus Renneyi, B. & Br., Ann. Nat. Hist., n. 1433 ; 

 Stev., Brit. Fung., p. 215. 



