WESTERN POLYPORES n 



This species was found rather commonly about Seattle, 

 Washington, on fallen logs and branches of red fir in moist 

 situations. At Glen Brook, Oregon, it occurred on Abies. It was 

 recently found on pine stumps at Del Monte, California. 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 hymenophore on drying. Paper touching the 

 fresh specimens is stained ferruginous and then bay. 



6. BJERKANDERA P. Karst. 



Hymenophore annual, epixylous, sessile, anoderm, glabrous, 

 azonate, corky; context white, tough or woody, not friable when 

 dry; tubes thin-walled, more or less smoke-colored, mouths 

 polygonal; spores smooth, hyaline. 



i. BJERKANDERA ADUSTA (Willd.) P. Karst. 



Pileus cespitose-imbricate, decurrent, sometimes effused, 

 conchate, fleshy-tough or corky, somewhat flexible when dry, 

 2-4 X 4-8 X 0.2-0.4 cm.; surface undulate, indistinctly zonate, 

 especially near the margin, finely tomentose or villose, isabelline 

 with slightly darker markings; margin thin, undulate, sterile, 

 pallid, usually becoming black as though scorched; context 

 fibrous-corky, white, 1-3.5 mm. thick; tubes short, I mm. or 

 less long, smoky-white to blackish within, mouths regular, 

 angular, 5-6 to a mm., smoke-colored and pruinose when young, 

 soon becoming grayish-black, edges thin, entire; spores ellipsoid- 

 allantoid, 3-5 X 1.5-2.5 /* 



Occasional on dead deciduous wood in California. This 

 species also occurs at times on coniferous wood. 



7. POLYPORUS (Micheli) Paulet 



Hymenophore annual, epixylous, small and simple, very rarely 

 large and compound; stipe central, eccentric or lateral, much 

 reduced at times in a few species, often partly or wholly brown 

 or black; surface usually smooth, the margin at times ciliate; 

 context white or yellowish, fibrous, tough to corky; hymenium 

 porose, at times alveolate; spores smooth, hyaline. 



Stipe pallid or light-brown, centrally attached, not darker than 



the pileus. 



Pileus ornamented with conspicuous tufts of fibrils. i. P. McMurphyi. 



Pileus plainly villose, at length becoming glabrous. 2. P. Polyporus. 



Pileus glabrous from the first. 3. P. columbiensis. 



