WESTERN POLYPORES 



2. CORIOLELLUS Murrill 



Hymenophore small, dry, annual, epixylous, semiresupinate ; 

 surface anoderm, usually azonate; context white, thin, fibrous 

 to corky; hymenium concolorous; tubes thin-walled, usually 

 rather large and irregular, dentate, but not irpiciform; spores 

 smooth, hyaline. 



Pileus grayish-fuscous, glabrous. i. C. Sequoiae. 



Pileus white or pale-isabelline, conspicuously villose or strigose. 2. C. cunealus. 



i. CORIOLELLUS SEQUOIAE (Copeland) Murrill 



Pileus spongy to corky, rather soft, very variable in shape, 

 effused, confluent, resupinate or narrowly reflexed, imbricate, 

 the reflexed portion glabrous, cinereous-fuscous; context very 

 thin, fuscous; tubes slender, cinereous, 5-7 mm. long, mouths 

 subcircular to angular, cinereous-umbrinous, edges thin, entire 

 to dentate. 



Occasional on burnt or decaying wood of Sequoia sempervirens 

 in California. 



2. CORIOLELLUS CUNEATUS Murrill 



Pileus thin, soft, flexible, cuneate to dimidiate, imbricate, often 

 effused, 0.5-1.5 X 1.5-3 X 0.2-0.4 cm.; surface conspicuously 

 villose, strigose behind, azonate or subzonate, white to isabelline; 

 margin thin, tomentose; context white to pale-yellowish, soft and 

 fibrous-spongy, 1-3 mm. thick; tubes short, white to discolored, 

 variable, i mm. or less in length, mouths angular to irregular, 

 1-3 to a mm., edges thin, soft, dentate-lacerate, splitting into 

 sharp teeth, which wear away with age; spores globose, 3-5 yu. 



Described from specimens collected in British Columbia by 

 John Macoun on the bark of "giant cedar," and also found in 

 Washington on Thuya plicata. 



3. SPONGIPORUS Murrill 



Hymenophore small, annual, epixylous, sessile, dimidiate, pul- 

 vinate; surface white, anoderm to subpelliculose, azonate, soft 

 and elastic; context white, extremely soft and spongy throughout; 

 hymenium rigid, somewhat discolored; tubes large, irregular, 

 thin-walled, lacerate; spores smooth, hyaline. 



