94 



Mycologia 



This species was rather common about Seattle on fallen logs 

 and branches of red fir in moist situations. At Glen Brook, 

 Oregon, it was found on Abies. When touched, it turns at once 

 to honey-yellow and later to bay, and some color approaching bay 

 is usually assumed by all or a portion of the sporophore on dry- 

 ing. Paper touching the fresh specimens is stained ferruginous 

 and then bay. 



Seattle, 43 (type), 54, /p, ,p/; Glen Brook, /pi; Corvallis, pp(5. 



Tyromyces caesius (Schrad.) Murrill. On dead trunks of 

 Abies grandis and other conifers. 

 Seattle, 70, 87. 



Tyromyces carbonarius sp. nov. 



Pileus quite irregular in shape, varying from flabelliform to 

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

 dry, I X 1.5-3 X 0.5-1 cm.; surface tomentose to glabrous, un- 

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

 rather thick, concolorous, narrowly sterile, undulate, rarely lobed ; 

 context white, tough to fragile; tubes equalling the thickness of 

 the context, white within, mouths normally rather regular, sub- 

 circular, 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 /x. 



Collected on a burnt red fir log. The tubes may be very 

 irregular at times, with long dissepiments, suggesting Irpiciporus. 

 There is a faint roseate hue to the hymenium which is quite char- 

 acteristic and rarely seen in species of this genus and its near 

 relatives. 



Seattle, 64 (type). 



Tyromyces chioneus (Fries) Karst. Collected once, on an oak 

 stump. 



Corvallis, P04. 



Tyromyces cutifractus sp. nov. 



Pileus usually broadly attached and laterally elongate, rarely 

 flabelliform, slightly imbricate at times, 2-3.5 X4-6 X 0.5-0.8 

 cm. ; surface glabrous, white, often rough and unsightly because 

 of the cracked and torn reddish-brown cuticle; context rather 

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

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



