12 WESTERN POLYPORES 



Stipe pallid, eccentric to lateral. 



Pileus white. 4- P- osseus. 



Pileus wood-brown. 5- P- Zelleri. 



Stipe wholly or partly black or fuliginous, variously attached, 

 usually darker than the pileus. 



Surface light-colored, isabelline to pale-ochraceous. 6. P. elegans. 



Surface dark-colored, bright-bay to almost black. 7. P. fissus. 



i. POLYPORUS MCMURPHYI Murrill, sp. nov. 



Pileus subcircular, convex to nearly plane, not at all depressed, 

 solitary, 5-7 X 0.5-1 cm.; surface yellowish-brown, subshining, 

 ornamented with conspicuous tufts of stout, pointed, erect fibrils 

 which are larger near the center; margin rather thin, slightly 

 ciliate, somewhat irregular, inflexed on drying; tubes white, 

 decurrent, somewhat favoloid but very small, the edges thin, 

 slightly collapsing and becoming uneven or toothed with age; 

 spores oblong-ellipsoid or fusiform, smooth, hyaline, plurigut- 

 tulate, 10 12 X 4-6 ju; stipe central or slightly eccentric, enlarged 

 above and below, solid, thick, white or whitish, reticulate or 

 hispid over its entire surface, reaching 4 cm. long and 1.5-2 cm. 

 thick. 



Type collected on a fallen dead branch of alder at San Francis- 

 quito Creek, near Stanford University, California, February 15, 

 1912, James McMurphy 166 (herb. Stanford Univ.). Also col- 

 lected during the winter of 1911 at Point Reyes, California, where 

 it was reported as abundant and edible. The surface of a typical 

 pileus exhibits under a lens an appearance similar to that of a 

 ripe pineapple or to a group of sacks of wheat tied up and standing 

 close together, with the fibrils drawn together in a cluster at the 

 center of each subcircular, convex area formed in the process of 

 drying. The specimens from Point Reyes do not exhibit this 

 character nor is the surface subshining, which may be accounted 

 for by weather conditions or the manner in which the specimens 

 were dried. This species is nearest to P.fagicola and P. hydniceps. 



2. POLYPORUS POLYPORUS (Retz.) Murrill 



Pileus circular, convex to plane, slightly umbilicate at times, 

 2-8 X 0.2-0.4 cm.; surface fuliginous, more rarely yellowish- 

 brown, hispid-squamulose to minutely hispid; margin at first 

 inflexed, thin, fimbriate, often becoming wavy or lobed; context 

 milk-white, membranous, 1-3 mm. thick; tubes adnate, white to 

 pallid, 1-2 mm. long, mouths circular, regular, 2-3 to a mm., 



