Polyporacese 



HEXAGONIA. 



Tubes from the first dilated in hexagonal channels, not stratose; 

 plants corky, sessile. Atkinson. (No edible species reported.) 



FAVOLUS. 



Tubes large at first, radiating from a central stem, or from a lateral 

 attachment in sessile or dimidiate forms ; plants tough and fleshy. At- 

 kinson. (No edible species reported.) 



CYCLOMYCES. 



Gills or tubes in concentric circles. Stem central, subcentral or none. 

 Atkinson. (No edible species reported.) 



MERULIUS. Page 490. 



Subgelatinous . Tubes very shallow , formed by anastomosing wrinkles ; 

 resupinate. 



BOLETI'NUS Kalchb. 

 (Plate CXIII, p. 402.) 



Boietinus. Hymenophore not even (as in Boletus), but extended in blunt points 

 descending like a trama among the tubes. Tubes not easily separable 

 from the hymenophore and from each other. Stem ringed, hollow. 

 Spores pale yellowish. Sylloge, Vol. VI, p. 51. 



Professor Peck has for excellent reasons, given in his Boleti of the 

 United States, emended the generic diagnosis of Fries thus : Hyme- 

 nium composed of broader radiating lamella connected by very numerous 

 more narrow anastomosing branches or partitions and forming large 

 angular pores. Tiibes somewhat tenacious, not easily separable from the 

 hymenophore and from each other, adnate or subdecurrent, yellowish. 

 Professor Peck classifies Boietinus as follows : 



Stem hollow B . cavipes 



Stem solid I 



I . Stem lateral or eccentric B. porosus 



I . Stem central 2 



2. Pileus^pale yellow, silky B. decipiens 



2. Pileus red or adorned with red scales 3 



398 



