Part 4, 1915] AGARICACEAE 233 
at the outer ends, even on the edges, rather close; stipe white or often stained more or less 
with red, equal to slightly tapering upward, glabrous, stuffed or spongy, 4-6 cm. long, 0.5-1 
cm. thick: spores white, globose, echinulate, 7—8.5 » in diameter. 
‘TYPE LocaLity: Sandlake, New York. 
Hasirat: On the ground in deciduous or mixed woods. 
DISTRIBUTION: Eastern United States as far south as Alabama. 
ILLUSTRATIONS: Bull. N. Y. State Mus. 116: pl. 107, f. 7-12; Mycologia 4: pl. 76, f. 6. 
105. Russula sericeonitens C. H. Kauffman, Rep. Mich. Acad. Sci. 
11: 84. 1909. 
Pileus convex, becoming plane or slightly depressed in the center, rather thin, 4-9 cm. 
broad; surface dark-violet-purple or purplish-red, blackish-livid toward the center, viscid 
when moist, the pellicle separable, with a silky-sheen, margin even: coniext purplish next to 
the cuticle, otherwise white, unchanging, taste mild, odor none; lamellae white, slightly yellow- 
ish with age or in drying, equal, some forking near the stipe and occasionally part way to the 
margin, narrow at the inner ends, broad at the outer, rather broad, subcrowded; stipe white, 
equal or thickened at the apex, firm, then spongy, glabrous, even or obscurely rivulose, 3-7 cm. 
long, 1-1.3 cm. thick: spores white, globose, echinulate, 6-7 » in diameter. 
TYPE LOCALITY: Michigan. 
Hasitat: In mixed woods of hemlock, maple, and yellow birch or oak. 
DISTRIBUTION: Michigan, Vermont, and New York. 
ILLUSTRATION: Mycologia 4: pl. 76, f. 1. 
106. Russula brunneola Burlingham, sp. nov. 
Pileus convex-umbilicate, then plane to depressed, up to 10 cm. broad; surface varying 
from Vandyke-brown to brownish-drah or burnt-umber, sometimes tinged with vinous-purple, 
rarely with olive-brown, paler when mature, viscid when moist, the cuticle separable on the 
margin, pruinose when young, glabrous; margin involute, soon striate-tuberculate: context 
rather firm, tinged with brownish or slate-violet under the cuticle, otherwise white, mild, the 
odor none; lamellae white, becoming yellowish in drying, the edges sometimes tinged with Van- 
dyke-brown, pruinose, forking near the stipe or a little distance away, venose-connected, equal, 
acute at the inner ends, rounded at the outer, close, rather broad; stipe white or tinged with 
slate-violet, nearly equal, glabrous, spongy, 4-6 cm. long, 1.5—2 cm. thick: spores white, glo- 
bose to elliptic, very minutely echinulate, 5-6 X 6-8 u. 
Type collected among spruce needles near a wood road under spruces and yellow birch saplings at 
Stratton, Vermont, August 7, 1911, Gertrude S. Burlingham 99-1911 (herb. Burlingham). 
DISTRIBUTION: Vermont, New Hampshire, and Massachusetts. 
107. Russula albella Peck, Ann. Rep. N. Y. State Mus. 50: 101. 
1897. 
Pileus fleshy, thin, plane or slightly depressed in the center, 5-7.5 cm. broad; surface 
white or whitish, sometimes tinged with pink or rose-red, especially on the margin, dry, 
glabrous; margin even or at length slightly striate: context white, taste mild; lamellae white, 
equal, close, thin; stipe white, equal, solid to spongy, 2.5-5 cm. long, 6-8 mm. thick: spores 
white, globose, 8 » in diameter. 
Typek Locality: Suffolk County, New York. 
Hasirat: Dry soil in woods. outa 
DistrRiButTion: New York and Mississippi. 
XXV. Fragiles. Pileus fragile, with separable pellicle; surface red or white, viscid when 
wet, glabrous; margin striate: context white, unchanging, acrid, without special odor; 
lamellae equal, simple: spores white. 
108. Russula subfragilis Burlingham. 
Agaricus niveus Pers. Syn. Fung. 438. 1801. Not A. niveus Scop. 1772. 
Agaricus fragilis Pers. Syn. Fung. 440. 1801. Not A. fragilis Schaeff. 1774. 
Russula fragilis Fries, Epicr. Myc. 359. 1838. 
