Parr 4, 1915] AGARICACEAE 227 
82. Russula betulina Burlingham, sp. nov. 
Pileus convex-umbilicate, then plane to depressed, 6-9 cm. broad; surface yellowish- 
salmon to reddish-salmon, salmon-flesh, or Etruscan-red, usually paler in the center, becoming 
deeper colored with age, viscid when moist, glabrous; margin even at first, then striate- 
tuberculate: context colored like the surface next to the cuticle, otherwise white, rather firm, 
taste mild, odor none; lamellae white, then maize-yellow, mostly equal, forking near the stipe, 
acute at the inner ends and rounded at the outer, close; stipe white, nearly equal, firm, stuffed, 
becoming spongy, glabrous, 3.5-7 cm. long, 1-2 em. thick: spores ochraceous, broadly elliptic, 
echinulate, 8.7 < 12.2 u or smaller. 
Type collected in rather sandy, black, vegetable soil in a moist place under yellow birch at 
Newfane, Vermont, July 5, 1911, Gertrude S. Burlingham 28-1911 (herb. Burlingham). 
DISTRIBUTION: Vermont and Colorado. 
83. Russula luteobasis Peck, Bull. Torrey Club 31: 179. 1904. 
Pileus convex, then nearly plane, 2.5-8 cm. broad; surface rosy or red, then all paler, 
yellowish in the center, viscid when wet, cuticle separable, glabrous; margin even, indistinctly 
striate when old; context white or whitish, the taste mild; lamellae white to cream-yellow 
or pale-ochraceous when old or in drying, equal, not forking, except near the stipe, adnexed to 
adnate, rather close, broad; stipe white, yellow to orange-yellow at the base, subequal, stuffed, 
2.5¢7 cm. long, 0.4-2 em. thick: spores yellow-ochraceous, subglobose, minutely roughened, 
7-8 » in diameter. 
TYPE LOCALITY: St. Louis, Missouri. 
Hasrrat: On the ground in woods. 
DIsTRIBUTION: Ohio and Missouri. 
84. Russula roseipes (Secr.) Bres. Fungi Trid. 1: 37. 1883. 
Agaricus alutaceus roseipes Secr. Mycogr. Suisse 1: 478. 1833. 
Pileus fleshy, from convex to plane or depressed, 4-7 cm. broad; surface rosy-incarnate, 
rosy-orange, or rosy-subochraceous, with white or pale spots, fading with age, viscid when wet, 
soon dry and then more or less pruinose; margin striate-tuberculate when mature: context 
white or yellowish, mild, odor agreeable; lamellae white to ochraceous, equal, some forked, 
venose-connected, adnexed to free, subdistant; stipe white, here and there rosy-sprinkled, 
stuffed, then hollow, 3-6 cm. long, 0.8-1.5 cm. thick: spores ochraceous, globose, echinulate, 
8-10 » in diameter. 
Type Locality: Italy. 
Hasirat: In coniferous or mixed woods. 
DISTRIBUTION: Vermont to Michigan; also in Europe. 
; Para ia Bres. Fungi Trid. pl. 40; Hard, Mushrooms f. 151; Mem. N.Y. State Mus. 3: 
pl. 34, f. I-7, 
85. Russula subalutacea Burlingham, sp. nov. 
Pileus fleshy, firm, convex, then becoming plane, 6-11 cm. broad; surface Pompeian-red, 
light-Corinthain-red, livid-brown to deep-livid-brown, vinaceous-purple, or dull-Indian-purple, 
fading more or less at the center or on the margin, sometimes to whitish, viscid when wet, 
soon dry, with the pellicle separable on the margin, the cuticle rarely cracking near the center, 
glabrous; margin always even, inrolled for some time: context pink next to the cuticle, other- 
wise white or grayish-white, mild, without special odor; lamellae white, then cream-colored 
and finally ochraceous, equal, some forking near the stipe or part way to the margin, venose- 
connected, rounded at the outer ends, narrowed and adnexed behind, close, 7~12 mm. broad; 
stipe white or marked with pinkish, equal or tapering downward, solid, very firm, pruinose 
when young, 4-6 cm. long, 1.5-3 cm. thick: spores ochraceous, globose to subglobose, echinu- 
late, 8.5 K 10 yu. 
Type collected on the ground in mixed woods at Tolland, Colorado, 2775 m. elevation, August 3, 
1914, L. O. Overholis 2093 (herb. Overholts; extype herb. Burlingham). 
DistRiBurion: In various places around Tolland, Colorado. 
86. Russula astringens Burlingham, sp. nov. 
"" Pileus broadly convex, then plane or a little depressed in the center, 9-11 cm. broad; 
surface blood-red-brown to red-brown, darker in the center, viscid when wet, with the pellicle 
