310 
Mycologia 
II. Russula alutacea Fries, Epicr. Myc. 362. 1838 
Agaricus alutaceus Fries, Syst. Myc. I: 55. 1821. 
Tacoma, Washington, Murrill ysi. 
These specimens which I am referring to Russula alutacea 
differ from the description in two respects ; the pruinose gills and 
the unfading pileus. Upon comparison with better foreign mate- 
rial than I have yet been able to obtain, it may be possible to clear 
away any doubt. They were abundant along the border of a lake 
in deciduous and evergreen forests. The pileus is broad, de- 
pressed, slimy, with separable pellicle, very dark purple-black, up 
to 15 or more cm. broad, with an even margin; the gills are cream- 
colored, avellaneous when dry and dusted with spores, sinuate; 
stipe equal, rose-colored, 10 cm. long, 2.5-3 cm. thick; spores 
yellow, broadly ellipsoid, echinate ; taste mild, odor none. 
12. Russula flaviceps Peck, Ann. Rep. N. Y. 
State Mus. 53 : 843. 1900 
Near Searsville Lake, California, McMurphy 20, December 
28, 1902. 
14. Russula crenulata sp. nov. 
Pileus broadly convex, then plane to depressed, up to 9 cm. 
broad ; surface milk-white or slightly yellow, viscid when moist, 
pellicle easily separable, glabrous; margin thin, slightly tubercu- 
late-striate with age; context fragile, white, taste very acrid; 
lamellae white, equal, adnate, plane, edges appearing under the 
lens finely notched or crenate, not forking, rounded at the outer 
end, narrowed at the inner, pruinose, close; stipe white, spongy, 
nearly equal or enlarged below, glabrous, 10 cm. long, 2 cm. thick ; 
spores white, mostly globose, echinulate, 10 1*. in diameter. 
Type collected at Glen Brook, Oregon, in a dense fir forest 
with a few oaks, November, 1911, W. A. Murrill ^62. This 
species differs from Russula albidula Peck in its larger size; 
crenulate gills, which are broader and adnate rather than decur- 
rent ; in the absence of forking gills ; and in the slightly tubercu- 
late-striate margin. 
15. Russula Murrillii sp. nov. 
Pileus convex, becoming plane then depressed, up to 5 cm. 
broad ; surface violaceous or darker in the center or entirely 
