212 NORTH AMERICAN FLORA [VOLUME 9 
26. Russula atropurpurea Peck, Ann. Rep. N. Y. State Mus. 41: 75. 
1888. 
Russula squalida Peck, Bull. N. Y. State Mus. 116: 80. 1907. 
Pileus convex, becoming plane or centrally depressed, up to 14 cm. broad; surface varying 
in color from vinous-purple to old-olive-green and sordid-brown, pruinose-velvety to glabrous, 
viscid when wet, with the cuticle separable on the margin; margin even, sometimes slightly 
striate when old: context white, changing to sordid-brown or fuliginous where bruised, mild 
in taste, with a disagreeable odor in drying; lamellae white, becoming pale-yellow, then brown- 
ish where injured or in drying, usually dusted with the spores, equal or with a few scattered 
short ones, some forking near the stipe, acute at the inner ends, rounded at the outer; stipe 
white or pinkish, glabrous, staining brownish where bruised, spongy-firm, 6 em. long, 2-3 cm. 
thick: spores maize-yellow, echinulate, subglobose, 7 * 7—8.7 yu. 
TYPE LOCALITY: Saratoga County, New York. 
Hastrar: In coniferous or mixed woods. a 
DistRIBUTION: New England south to North Carolina and west to Michigan and Colorado. 
27. Russula serissima Peck, Bull. N. VY. State Mus. 139: 44. 1910. 
Pileus fleshy, thin, fragile, convex, becoming nearly plane or centrally depressed, 5-7 cm. 
broad; surface variable in color, pale-olive-green or brownish-purple, sometimes spotted in the 
center, viscid when moist, with the cuticle separable on the margin, pruinose to glabrous; 
margin even or obscurely striate when old: context white or whitish, not changing to brown 
where wounded, but becoming smoke-colored in drying, mild or slightly and tardily acrid, 
with a strong, unpleasant odor in drying, the odor persisting for some time; lamellae cream- 
colored or buff, becoming smoky or dingy in drying, equal, seldom forking, narrow next to 
the stipe, rounded at the outer ends, adnexed, sometimes seceding, usually pruinose, thin, 
close, 4-8 mm. broad; stipe white, assuming a somewhat smoky hue in drying, equal or 
tapering upward, 4-7 cm. long, 0.8-2 cm. thick: spores buff-yellow, subglobose, echinulate, 
7.6 X% 9.5 pe 
TYPE LOCALITY: Ellis, Massachusetts. 
Hasitat: Under fallen leaves in woods. 
DISTRIBUTION: Massachusetts. 
VI. Insignes. Pileus with the pellicle separable to the disk, slightly viscid when wet 
but appearing dry for the most part, minutely granular or squamulose or flocculose, white or 
some shade of yellow or pink; margin even; context white, not changing color, mild or acrid, 
without special odor; lamellae equal, some forking, adnate or adnexed to slightly decurrent: 
spores white. 
28. Russula insignis Burlingham, sp. nov. 
Pileus convex to nearly plane or depressed, up to 8.2 cm. broad; surface cream-white in 
the outer portion, darker dull-yellow at the center, pruinose to glabrous on the disk, minutely 
granular from the disk to the extreme margin, with the pellicle separable only on the margin, 
if viscid, soon dry and unpolished; margin striatulate when mature, slow in expanding: 
context firm, white, mild and agreeable in taste; lamellae white, mostly equal, occasionally 
forked, rounded at the outer ends, adnexed, close, thin, broad; stipe scurfy or squamulose 
with yellow nearly to the apex, nearly white at the apex, entirely dark-dull-yellow at the base, 
attenuate upward, loosely stuffed, dry, up to 7.5 cm. long, 2.5 cm. thick: spores white, 
elliptic, echinulate, 6.5 X 8.5 yp. 
Typx collected in swampy mixed woods at Stow, Massachusetts, August 17, 1913, Simon Davis 
i-1913 (herb. Burlingham). 
DIstRIBUTION: Stow and Milton, Massachusetts. 
29. Russula Ballouii Peck, Bull. N. Y. State Mus. 167: 31. 1913. 
Pileus thin, broadly convex, nearly plane or slightly depressed in the center, 2-5 cm. 
broad; surface yellow when moist, grayish-yellow when the moisture has escaped, the pale- 
brick-red cuticle cracking into minute scales everywhere except in the center, not viscid but 
