Part 4, 1915] AGARICACEKAE 207 
7. Russula subusta Burlingham. 
Agaricus adustus Fries, Syst. Myc. 1:60. 1821. Not A. adustus With. 1792. 
Russula adusta Fries, Epicr. Myc. 350. 1838. 
Pileus fleshy, convex, depressed, then infundibuliform, 5-16 em. broad; surface white or 
whitish, becoming cinereous or fuliginous, dry, glabrous; margin at first inflexed, even, glab- 
rous, then upturned: context firm, thick, white, unchanging, the taste mild; lamellae white, 
slightly sordid with age, unequal, seldom forking, close, from adnate to decurrent, thin; stipe 
colored like the pileus, equal, solid, 2.5-5 cm. long, 1-2 cm. thick: spores white, subglobose, 
echinulate, 7-9 X 8-10 x. 
TYPE LOCALITY: Sweden. 
Hasitat: In mixed woods. 
DISTRIBUTION: New England to Michigan and south to Alabama; also in Europe. 
InLustrations: Atk. Stud. Am. Fungi 1. 40, f. 6; Cooke, Brit. Fungi pl. 1051; Hard, Mush- 
ae t a ; Krombh. Abbild. /. 70, f. 7-11 (as Agaricus nigricans); Ricken, Blatterp. Deutschl. 
pl. 15, f. 3. 
8. Russula delica Fries, Epicr. Myc. 350. 1838. 
Hypophylium album Paulet & Lév. Ic. Champ. 33. 1855. 
Russula deliciosa Schrét. Krypt.-Fi. Schles. 31: 549, 1889. 
Russula brevipes Peck, Ann. Rep. N. Y. State Mus. 54: 178. 1901. 
Pileus fleshy, of medium thickness, firm, broadly convex-umbilicate, then spreading, 
and at length infundibuliform, 8-16 cm. broad; surface white, sometimes with yellowish 
stains when the pileus has brought soil up with it, easily staining yellowish in drying, dry, 
glabrous or sometimes under the lens appearing obscurely tomentose from the pulling apart 
of the fibers in the outer layer; margin even, involute, late in expanding: context firm, white, 
unchanging where bruised, slowly becoming slightly acrid; lamellae white, the edges often 
becoming faintly glaucous-green when mature or in the process of drying, becoming yellowish 
where rubbed, some equal, some forking, narrowed at both ends, decurrent, subdistant to 
distant, rather narrow; stipe white, sometimes with a glaucous-green ring at the apex, glabrous 
or sometimes under a lens slightly downy at the apex, 2-5 cm. long, 1-2 cm. thick: spores 
white, subglobose, tuberculate, 9 X 10. 
Typ LocaLity: Europe. 
Hastrat: In dry woods, especially coniferous woods. . 
DISTRIBUTION: Maine to Alabama and Mississippi and west to Colorado; also in Europe. 
ILLUSTRATIONS: Cooke, Brit. Fungi pl. 1068; Gill. Champ. Fr. pl. 174 (607); Lucand, Champ. 
Fr. pl. 146; Pat. Tab. Fung. pl. 514; Paulet & Lév. Ic. Champ. #1. 73, f. 1; Ann. Rep. N. ¥. State 
Mus. 54: pl. 71, f. 1-5; Richon & Roze, Atl. Champ. 1. 40, f. 1-4; Ricken, Blatterp. Deutschl. 2: pl. 
15, f. 1. 
Exsiccat1: Clements, Crypt. Form. Colo. 366; Roum. Fungi Gall. 5320. 
9, Russula eccentrica Peck, Bull. N. Y. State Mus. 150: 61. 1911. 
Pileus fleshy but thin, eccentric or deformed, at first centrally depressed, becoming nearly 
plane, 5-10 cm. broad; surface brownish or brownish-gray, faintly reddish-brown when dry, 
glabrous, dry; margin even, incurved at first and for some time: context white, with disagree- 
able odor; lamellae pallid or tinged with pink, becoming reddish where wounded, unequal, 
adnate or adnexed, thin, subdistant, broad; stipe white, equal, smooth, spongy within, 4~6 
em. long, 1.5-3 em. thick: spores white, subglobose, smooth or nearly so, 5-7 X 6-8 nu. 
Types Locatity: Near St. Louis, Missouri. 
Hasirtat: In a grassy ravine in open oak woods. 
DISTRIBUTION: Known only from the type locality. 
10. Russula polyphylla Peck, Bull. Torrey Club 25: 370. 1898. 
Pileus convex, becoming depressed or infundibuliform, 7.5-12.5 cm. broad; surface pale- 
flesh-colored, sordid-yellowish when dry, subareolate, glabrous; margin even: context firm, mild 
in taste, odor heavy; lamellae reddish-flesh-colored, umber when dried, unequal, many, very 
close, adnate to subdecurrent, narrow; stipe concolorous, equal, hollow, 5-7.5 cm. long, 
1.5-2.5 em. thick: spores probably white, somewhat irregular or one-sided in shape, minutely 
echinulate, 6-7.5 X 7.5 yu. 
TYPE LOCALITY: Auburn, Alabama. 
Hastirat: On the ground in woods. . 
DISTRIBUTION: Known only from the type locality. 
