216 NORTH AMERICAN FLORA [Volume 9 
40. Russula variata Banning & Peck; Peck, Bull. N. Y. State Mus. 
105: 41. 1906. 
Pileus fleshy, firm, convex, becoming centrally depressed or subinfundibuliform, up to 12 
cm. broad; surface reddish-purple or brownish-purple, often variegated with green or wholly 
pea-green, viscid when wet, cuticle separable on the margin only, sometimes cracking and 
areolate toward the margin, glabrous; margin even, thin: context white, acrid or tardily acrid; 
lamellae white, some of them short, forking from one to three times, tapering at each end, 
thin, close, narrow; stipe white, equal or nearly so, solid or at length with one or more cavities, 
3.5-7.5 cm. long, 1-2 cm. thick: spores white, subglobose, 7-10” in diameter. 
TyPE LocaLity: Baltimore, Maryland. 
Hanrrat: In either coniferous or deciduous woods. 
DIstRIBUTION: Eastern United States from Vermont to Virginia. 
Inuustrations: Bull. N. Y. State Mus. 105: pl. 101, 7. I-5, 
IX. Basifurcatae. Pileus firm, broad; pellicle separable on the margin only; surface 
white or whitish tinged with yellow or reddish-yellow, viscid when wet, glabrous; margin even: 
context white, unchanging, mild to bitterish or acrid; lamellae white at first, mostly equal, 
many forked at the base, narrowed toward the stipe: spores pale-yellow. 
41. Russula basifurcata Peck, Ann. Rep. N. Y. State Mus. 38: 90. 
1885, 
Pileus fleshy, firm, convex, umbilicate, becoming subinfundibuliform, 5—7.5 cm. broad, 
surface dingy-white, often tinged with yellow or reddish-yellow, slightly viscid when moist; 
the pellicle separable on the margin only, glabrous; margin even: context white, mild then 
bitterish; lamellae white, becoming yellowish, a few short ones intermingled, many forked at 
or near the base, narrowed toward the stipe, adnate or slightly emarginate, close; stipe white, 
firm, solid, becoming spongy within, 1.6-2.5 cm. long, 1-1.3 cm. thick: spores pale-yellow, 
elliptic, 7-8 » long. 
TYPE LocaLity: New York. 
Hasitat: Dry ground in woods and bushy places. 
DistTRisutIon: Maine and Vermont. 
42. Russula albidula Peck, Bull. Torrey Club 25: 370. 1898. 
Pileus fleshy, convex to subplane, at length subinfundibuliform, 2.5-10 em. broad; surface 
white, becoming yellowish in drying, viscid with separable pellicle, glabrous; margin even: 
context white, firm, acrid; lamellae white, equal, sometimes forking next to the stipe, rather 
close, adnate or slightly decurrent; stipe white, equal, smooth, glabrous, solid, 2.5-6 cm. long, 
8-20 mm. thick: spores pale-yellow, subglobose, marked with broken reticulations, 6—-7.5 
X 7.5-10 p. 
TYPE LocaLity: Auburn, Alabama. 
Hasirtat: In pine, spruce, or oak woods. 
DIstTRIBUTION: Vermont to Alabama and west to Michigan. 
X. Heterophyllae. Pileus rather firm, broad; pellicle separable on the margin only; 
surface viscid when wet, glabrous; margin even or slightly striate: context white, unchanging, 
mild to acrid, without special odor; lamellae with many short ones of vatious lengths regularly 
intermingled, some forking: spores white or cream-white. 
43. Russula heterophylla Fries, Epicr. Myc. 352. 1838. 
Agaricus heterophyllus Fries, Syst. Myc. 1:59. 1821. 
Pileus fleshy, firm, convex, then plane to depressed, up to 10 cm. broad; surface yellowish- 
olive-green to golden-bronze-green, viscid when wet, with thin, separable pellicle, glabrous 
smooth; margin incurved up to maturity, even or slightly and closely striate: coitert white, 
mild in taste; lamellae white, many short and varying in length, some forking or anastomoses 
near the stipe, many forking midway to the margin but not often forking twice, tapering at 
