WESTERN POLYPORES 23 



tubes short, grayish-umbrinous within, 1-3 mm. long, mouths 

 small, angular, 2-4 to a mm., whitish when young, becoming 

 fulvous, edges thin, dentate to lacerate, soon collapsing; spores 

 ovoid, smooth, pale-yellowish-brown, 4-6 X 2-3.5 M; stipe bulb- 

 ous and often united with that of neighboring plants at the 

 base, tapering upward, velvety, ferruginous to fulvous, solid, 

 corky, 3-5 cm. long, 2-5 mm. thick. 



Rather common throughout on exposed sandy or burnt soil 

 in woods. 



2. COLTRICIA TOMENTOSA (Fries) Murrill 



Pileus circular, varying to dimidiate, sometimes cespitose, 

 6-12 cm. in diameter, 3-5 mm. thick; surface ferruginous-fulvous, 

 azonate, rarely subzonate, tomentose, plane or depressed at the 

 center; margin lighter in color, sterile, acute, entire to lobed; 

 context duplex, soft-corky, concolorous and spongy above, 

 corky-woody, fibrous and flavous-ferruginous below, 2-4 mm. 

 thick; tubes sometimes decurrent, about I mm. long, avellaneous 

 within, mouths small, equal, angular, 3-5 to a mm., covered at 

 first with a whitish substance, edges white, entire, becoming 

 grayish-umbrinous, very thin and toothed with age; spores 

 ellipsoid, smooth, pale-yellowish-brown, 5-7 X 2-4 fj.; cystidia 

 abundant, more or less curved, ovate-lanceolate at first, becoming 

 more slender, fulvous-brown, 50-75 X 6-15 ^; stipe central to 

 lateral or wanting, unequal, obese, fulvous, tomentose, re- 

 sembling the context within, 0-5 cm. long, 5-15 mm. thick. 



Occasional in California on or about dead coniferous stumps. 



19. CRYPTOPORUS (Peck) Hubbard 



Hymenophore subglobose, sessile, epixylous; surface smooth, 

 encrusted; context white, corky; tubes white, concealed at first 

 by a volva, which is perforated at one or more points at maturity; 

 mouths constricted, discolored; spores smooth, hyaline. 



i. CRYPTOPORUS VOLVATUS (Peck) Hubbard 



Pileus simple, sessile, rarely spuriously stipitate, globose to 

 ungulate, 2-6 cm. broad, 1.5-3 cm. thick; surface white, some- 

 times slightly reddish-brown, smooth, slightly viscid or resinous 

 when young, glabrous, marked with anastomosing depressed 

 lines in larger specimens; margin very rounded, concolorous, 

 smooth, produced into a volva covering the tubes, at length 

 ruptured at 1-3 points forming small rounded or irregular aper- 

 tures; context soft-corky, homogeneous, white, 2-5 mm. thick; 



