362 POLYPORACE^E Poria 



1643. P. hymenoeystis Cooke (from the cyst-like pores of the 



hymenium) a b. 



Sub. very thin, arachnoid. Po. large, shallow, irregular, dissepi- 

 ments scarious, collapsing, white, becoming pallid ; marg. 

 narrow, byssoid. 



Black, rotten wood. 4 in. 



1644. P. blepharistoma Cooke (from the eyelid-like appearance of 



the pores ; Gr. blepharon, an eyelid, stoma, a mouth) a b. 

 Snb. a thin film. Po. small, dissepiments thin, edge finely 



toothed, white ; marg. barren, edge minutely byssoid, somewhat 



mealy. Myc. arachnoid. 

 Dead wood, decorticated branches, leaf-mould. July-Nov. 4 in. 



1645. P. eorticola Cooke (from its growing on bark ; cortex, bark, 



colo, to inhabit) a. 



Snb. a film, firm. Po. very minute, often obsolete, or in small 

 irregular patches, white to biscuit ; marg. radiate, byssoid. 



Poplar, birch, horse-chestnut, fir. 3^ in. 



1646. P. retieulata Cooke (from the net-like hymenium ; refe, a 



net) a c. 



Snb. a thin film. Po. cup-like, somewhat large, white; marg. 

 barren, radiato-floccose or byssoid. 



Orbicular, confluent. Rotten wood. Sept. -Feb. 4 in. Very delicate, 

 soon disappearing. 



1647. P. bathypora Cooke (from the deep cup-like pores; Gr. 



bathus, deep, poros, a pore) a. 



Snb. a thin film. Pe. cup-shaped, somewhat large, dissepiments 

 toothed, white, becoming brownish ; marg. flaxy. 



Effused. Dead oak, beech. 3^ in. Sometimes 2-stratose. Resembling 

 the resupinate form of 1660. 



1648. P. hybrida Cooke (from the possibility of its being a monstrous 



form of 1559) a b c. 



Sub. a thick felt-like membrane, white, sometimes branched, 

 sometimes forming small inflexed superimposed white pilei. 

 Po. very minute to large, shallow, to -J in. deep, torn, white 

 to biscuit ; marg. irregularly radiato-branched. 



On oak in ships, etc., causing "dry-rot." Jan. -Dec. 7 in. Sometimes a 

 mere radiato-branched white membrane with a few small patches of pores 

 or forming pendulous masses from horizontal beams, with tubes beneath. 



LXVI. TRAMETES Fr. 



(From the generic distinction depending on the frama the substance 

 which grows between the membranes of which the dissepiments 

 of the pores are composed.) 



Trama continuous and homogeneous with the flesh of the pileus. 

 Pilcus, when present, woody, corky-woody, corky or soft. Stem 



