Part 4, 1915] AGARICACEAE 225 
74. Russula flaviceps Peck, Ann. Rep. N. Y. State Mus. 53: 843. 
1900. 
Pileus convex, then expanding and slightly depressed in the center, 5-10 cm. broad; 
surface amber-yellow to golden-yellow, viscid, with separable pellicle, glabrous; margin even 
when young, faintly striate when old: context white, mild or slightly acrid; lamellae white, 
soon becoming Naples-yellow and dusted with the spores, equal, simple, adnate or slightly 
rounded next to the stipe, broader at the outer ends, rather narrow, close; stipe white, equal 
or nearly so, stuffed or spongy within, 4-6.5 em. long, 8-12 mm. thick: spores maize-yellow to 
pitchpin, subglobose, about 8 # in diameter. 
‘Tver Locautry: Sullivan County, New York. 
Hasirat: In deciduous woods. 
DISTRIBUTION: New York, Vermont, and the Pacific coast. 
75. Russula sulcatipes Murrill, Mycologia 4: 291. 1912. 
Pileus convex to plane or depressed, reaching 7 cm. broad; surface pale-avellaneous- 
isabelline, dry, pruinose, smooth; margin slightly striate, becoming more conspicuously so 
on drying: context white, very thin, very firm, mild and nutty to the taste, the odor not char- 
acteristic; lamellae white, becoming cream-colored or somewhat darker on drying, adnate, 
plane, subdistant; stipe milk-white, equal or slightly larger below, with rather conspicuous 
longitudinal raised lines, glabrous, solid, 5 cm. long, 1.3 em. thick: spores hyaline under the 
microscope, globose, roughly tuberculate, 7-9 » in diameter. 
TYPE LOCALITY: Bronx Park, New York City. 
Hasrirat: In oak woods. 
DistrisuTion: Known only ee hae type locality. 
ILLUSTRATION: Mycologia 4: pl. 76, f. 4. 
XIX. Decolorantes. Pileus with the pellicle partly sepaftable; surface red, orange, or 
yellow, viscid when wet, glabrous; margin striate with age: context white, becoming gray to 
black where britised or in ‘drying, mild in taste, without special odor; lamellae equal, some 
forking near the stipe: spores white or yellow. 
76. Russula decolorans Fries, Epicr. Myc. 361. 1838. 
Agaricus decolorans Fries, Syst. Myc. 1:56, 1821. 
Russulina decolorans Schrét. Krypt.-Fl. Schies. 31: 551. 1889. 
Pileus globose, becoming plane with the center slightly depressed, up to 10 em. broad; 
surface varying from light-red to coppery-orange, bronzy-old-rose, or salmon, the center often 
ocher, fading, viscid when moist, pellicle partly separable, glabrous; margin even, becoming 
striate with age: context white, becoming cinereous with age or where injured, firm, becoming 
fragile with age, the taste mild; lamellae white, becoming maize-yellow, somewhat gray in 
drying, equal, some forking next to the stipe, venose-connected, acute at the inner ends and 
broad at the outer, rather broad, close; stipe white, becoming cinereous, nearly equal, firm, 
becoming spongy, 6-9 cm. long, 1.5--3 cm. thick: spores pitchpin, subglobose, coarsely echinu- 
late, 8.5-9 X 10.5 yw. 
TYPE LocaLity: Sweden. 
Hasirat: In coniferous or mixed woods. 
DistRIBuTIon: New England to Long Island and west to Michigan; also in Europe. 
ILnustTrations: Cooke, Brit. Fungi pl. 1079; Ricken, Blatterp. Deutschl. pl. 17, Ff. 5. 
77. Russula obscura Romell, Oefv. Sv. Vet.-Akad. Férh. 48: 179. 1891. 
Russula vinose Lindbl. Svampbok 67. 1901. 
Pilews convex, then plane to centrally depressed, usually up to 7 cm. broad, rarely much 
larger; surface dull-dark-red, often blackish in the center, viscid when wet, slightly pruinose 
when dry; margin even, slightly striate with age; context white, becoming ashy-gray with 
age or where bruised, mild in taste; lamellae white, then pale-yellow, equal, some forking 
next to the stipe, venose-connected, abruptly narrowed or rounded behind and slightly adnexed, 
close, rather broad; stipe white, sometimes tinged with red, becoming gray or blackish with 
