Murrill: Pacific Coast Polyporaceae and Boletaceae 95 



yellowish within and without, staining brownish when bruised, 

 mouths glistening, small, quite regular, angular, edges entire, very 

 thin; spores ellipsoid, smooth, hyaline, 6 X4ai. 



Type collected on a much decayed fir log in a virgin forest at 

 Newport, Oregon. Also collected on a maple log and on the base 

 of a living trunk of Thuya at Seattle. This disregard of essen- 

 tial differences between coniferous and deciduous wood is rather 

 uncommon in fungi. 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 grow- 

 ing in moist situations. 



Seattle, 55, pp; Newport, 1064 {type). 



Tyromyces perdelicatus sp. nov. 



Pileus flabelliform to subcircular, varying with its position on 

 the substratum, thin, fragile, milk-white throughout, 1-2 cm. 

 broad; surface finely tomentose to glabrous, scarcely zonate, 

 uneven, margin concolorous, thin, inflexed when dry ; context 

 very thin, white, fragile ; tubes minute, glistening, mouths angular, 

 subregular, edges very thin, slightly toothed, fragile ; spores 

 oblong-ellipsoid, smooth, hyaline, 7 X 3 />t. 



This small, snow-white species was collected several times at 

 Seattle on fallen dead branches of conifers, and it was also 

 found common at Glen Brook. The type specimens grew on 

 Tsuga heterophylla. 



Seattle, ^5, 4/ (type), 51, 33; Glen Brook, y8o. 



Tyromyces guttulatus (Peck) Murrill. Rare on coniferous 

 stumps and logs. This species contains a bitter principle mi'dly 

 resembling in taste the resin found in Fomes Laricis. 

 Seattle, 5p; Tacoma, p<5*. 



Tyromyces Pseudotsugae sp. nov. 



Pileus imbricate-sessile, flabelliform to semicircular, 2-3 X 

 2-3 X 0.3-1 cm. ; surface milk-white, subglabrous, azonate or 

 with zones faintly outlined, margin thin, concolorous, narrowly 

 sterile, entire to slightly lobed, inflexed when dry; context thin, 

 white, fragile ; tubes varying greatly in length, those behind often 

 reaching nearly i cm., mouths large, irregular, edges thin, fragile, 

 toothed, collapsing, white, becoming yellowish on drying; spores 

 ovoid, smooth, hyaline, 5 X 3-5 



