Part 4, 1915] AGARICACEAE 211 
white, then cream-colored, darker in drying, equal, some forking near the stipe, interveined, 
narrow at the inner ends, broad at the outer, rather close; stipe colored like the pileus or 
slightly paler, usually white at each end, sometimes entirely white, rarely greenish in drying, 
equal or tapering downward, solid to spongy, 2.5-5.5 cm. long, 0.6-2 cm. thick: spores pale- 
yellow, globose, echinulate, apiculate, 7-8.75 » in diameter. 
TYPE LOCALITY: New York. 
Hasrrat: In open deciduous woods or groves or by roadsides through woods. 
DistTRiBvution: Vermont to Alabama and Louisiana and west to Michigan. 
ILLUSTRATIONS: Bull. N, Y. State Mus. 75: pl. 85, f. 1-8; Mycologia 4: pl. 76, f. 2, 8. 
23. Russula rubriochracea Murrill, Mycologia 4: 293. 1912. 
Pileus convex to plane or slightly depressed, reaching 6 cm. broad; surface red or purple 
with a bloom, darker in the center, dry, smooth; margin entire: context white, thin, the taste 
at first nutty, becoming distinctly but not violently acrid, the odor not characteristic; lamellae 
exactly ochraceous even in a very young stage, adnexed, plane, subdistant; stipe pale-rose- 
colored or lilac, tapering below, smooth, dry, glabrous, 4.5 cm. long, 1.3 cm. thick: spores 
ochraceous in mass, subglobose, roughly tuberculate, 8-11 « in diameter. 
TYPE LOCALITY: Bronx Park, New York City. 
Hapsirat: On the ground in oak woods. 
DisTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Mycologia 4: pl. 76, f. 9. 
24. Russula flavida Frost & Peck; Peck, Ann. Rep. N. Y. State 
Mus. 32: 32. 1880. 
Pileus fleshy, firm, convex, becoming nearly plane or centrally depressed, 3-7.5 cm. broad; 
surface chrome-yellow, sometimes cadmium-yellow or orange in the center, velvety-pruinose 
or mealy, especially on the margin, dry; margin even, sometimes fading: context white, taste 
mild; lamellae pure-white when fresh but dingy or clay-colored when old or dried, equal, 
entire for the most part, rather close and thick; stipe colored like the pileus or a little paler, 
sometimes brighter at the base, equal or slightly tapering upward, solid, becoming spongy 
within and sometimes hollow, 3.5—-7.5 cm. long, 0.8-1.6 cm. thick: spores yellowish, subglobose, 
echinulate, 6-7 X 7-8 yu. 
TYPE LOCALITY: Sandlake, New York. 
Hasirat: In grassy places among bushes or in woods. 
DIsTRIBUTION: Vermont and Connecticut south to Alabama and in Ohio. 
ILLUSTRATIONS: Bull. N. Y. State Mus. 105: pl. 97, f. 1-6. 
25. Russula Murrillii Burl. Mycologia 5: 310. 1913. 
Pileus convex, becoming plane then depressed, up to 5 cm. broad; surface violaceous or 
darker in the center or entirely darker, pruinose, becoming floccose-pruinose, evidently viscid 
when wet but soon dry; margin even: context white, thin, taste not noted; lamellae ochroleu- 
cous when fresh, becoming deeper yellow, equal, rarely forking next to the stipe, venose- 
connected, rounded at the outer ends, narrowly adnate at the inner, subdistant, rather broad; 
stipe chalk-white, unchanging in drying, nearly equal, firm, stuffed, then tending to become 
hollow, glabrous; spores pale-yellow, echinulate, some globose but many elliptic, 7 & 10 p. 
TYPE Locauity: Corvallis, Oregon. 
Hasirart: In fir forests with scattered specimens of oak, birch, willow, and maple. 
DISTRIBUTION: Known only from the type locality. 
V. Atropurpureae. Pileus broad, with the pellicle separable on the margin, slightly viscid 
to plainly viscid when moist, variable in color, vinous-purple to brownish-purple intermingled 
with olive-green or lighter green, pruinose-velvety to glabrous; margin even, sometimes 
obscurely striate when old: context white, unchanging where wounded or becoming sordid- 
brown, and in any case yellowish to smoke-colored in drying, rather firm, mild or slightly and 
tardily acrid, with a disagreeable odor in drying; lamellae whitish or cream-colored, deeper 
colored with age, brown or smoke-colored in drying, sometimes changing to brownish where 
injured, mostly equal or with a few scattered short ones, some forking, but sometimes simple: 
spores yellow. 
