HYMEXOCHAETE. 115 



hymennim studded with projecting, smooth, thick-walled, 

 coloured, sharp-pointed cystidia (or setae), which are un- 

 doubtedly modified cystidia. A few abeiTant species with 

 thin-walled, pale-coloured setae more or less studded with 

 lumps of lime connect the present genus with Peniojihora. 

 The species were formerly included in Stereum and Corticium. 



I. Upper portion of sporopliore usually free and refiexed. 



Spores colourless. 



Hymenochaete rubiginosa. Lev. (fig. 5a, p. 94.) 

 Coriaceous, rigid, effused, reflexed, velvety then glabrous, 

 ferruginous-brown, intennediate stratum foxy rust-colour ; 

 hymenium rust-colour, setae conical-acute, or cylindrical and 

 obtuse, 80-100 x 5-8 /x ; spores elliptical, 5 X 3 yu. 



Bymenocliaete rubiginosa, Lev., Ann. Sci. Nat., ser. 3, v. 

 p. 151 ; Mass., Mon. Thel., p. 97. 



On wood. Sometimes altogether resupinate or with the 

 margin only free, or with little reflexed pileoli springing as 

 it were from the surface of the adnate portion, or broadly 

 reflexed and densely imbricate, ferruginous brown, often 

 with a purple tinge ; margin usually brighter and becoming- 

 smooth. Hymenium sometimes concentrically undulate. In 

 addition to the normal setae, stout cylindrical, obtuse, thin- 

 walled, pale-brown bodies intermediate l^etween setae and 

 cystidia are sparingly met with in the hymenium ; somewhat 

 resembling H. tahacina, but distinguished at once by the 

 colourless spores. 



Hymenochaete avellana. Cooke. 



Coriaceous, hard ; efiused margin obtuse, free, narrowly 

 reflexed, reddish-brown velvety ; hymenium minutely 

 velvety, pale brown, readily becoming stained with red on 

 being bruised; setae cylindrical, obtuse, 80-140 x 7-9 fx: 

 spores cylindric-elliptical, 6-7 X 3 [x. 



Hymenochaete avellana, Cke., Grev. viii. 140 ; Mass., Mon, 

 Thel., p. 103. 



Stereum avellanum, Fries, Epicr. 551. 



On hazel, beech, &c. Patches small as a rule, sometimes 

 efifused ; margin free all round or reflexed above; hymenium 

 when dry dingy ferruginous, pruinose. 



I 2 



