8 WESTERN POLYPORES 



firm, almost woody, but friable, milk-white; tubes slender, 2 or 

 3 times as long as the thickness of the context, white or yellowish 

 within and without, staining brownish when bruised, mouths 

 glistening, small, quite regular, angular, edges entire, very thin; 

 spores ellipsoid, smooth, hyaline, 6 X 4 fj.. 



Collected on a much decayed fir log in a virgin forest at New- 

 port, Oregon, and also on a maple log and trunks of Thuya and 

 Pseudotsuga in Washington. The species is peculiar in having a 

 brownish cuticle, gelatinous in appearance when wet, which 

 breaks up as the pileus develops, leaving the surface very rough 

 and unattractive in appearance, especially when plants are 

 growing in moist situations. 



5. TYROMYCES CHIONEUS (Fries) P. Karst. 



Pileus imbricate, sessile, dimidiate, convex, 2-4 X 3-6 X I 

 cm.; surface sodden, grayish-cinereous or yellowish-white, 

 azonate, smooth, pubescent to glabrous, margin acute but rather 

 thick, entire, concolorous, fertile; context sodden and watery 

 when fresh, with a mild flavor and acid odor, white, homogeneous 

 and fragile when dry, cutting with a smooth surface, 7-10 mm. 

 thick; tubes shorter than the thickness of the context, 2-4 mm. 

 long, white to yellowish within, fragile, mouths even, glistening, 

 angular, sinuous at times, 4 to a mm., white to ochraceous, 

 edges thin, fimbriate-dentate ; spores cylindric, curved, 4-5 



X 1-2 fJL. 



Found once on an oak stump at Corvallis, Oregon. 



6. TYROMYCES CARBONARIUS Murrill 



Pileus quite irregular in shape, varying from flabelliform to 

 broadly sessile and laterally elongate, juicy, tough, fragile when 

 dry, i X i. 5-3X0. 5-1 cm.; surface tomentose to glabrous, uneven, 

 white or hygrophanous, azonate, margin pale-rose-tinted, rather 

 thick, narrowly sterile, undulate, rarely lobed; context white, 

 tough to fragile; tubes equaling the thickness of the context, 

 white within, mouths normally rather regular, subcircular, 4 to 

 a mm., not glistening, edges white or pale-rose-tinted, thin, 

 sometimes irpiciform; spores oblong-ellipsoid, smooth, hyaline, 

 5 X 1.5-2/z. 



Collected on a burnt red fir log at Seattle, Washington. The 

 tubes may be very irregular at times, with long dissepiments, 

 suggesting Irpiciporus. There is a faint roseate hue to the hy- 



