Parr 3, 1910] AGARICACEAE 18] 
16. Lactaria trivialis Fries, Epicr. Myc. 337. 1838. 
Agaricus trivialis Fries, Obs. Myc. 1: 61, 1815. 
Lactaria deflexa Lindblad, Monogr. Lact. Suec. 8. 1855. 
Pileus fleshy, depressed in the center, then plane to infundibuliform, up to 15 cm. 
broad; surface plum-colored, or smoke-gray tinted with livid when young, fading, becom- 
ing putty-colored to snuff-brown, or remaining lilac-tinted in the center, azonate, viscid, 
glabrous; margin even, involute on the extreme edge for some time, pruinose at first : con- 
text firm, white ; latex white or creamy-white, drying on the broken flesh or lamellae pale- 
greenish, acrid ; lamellae cream-colored to yellowish, some forking, close, slightly decur- 
rent, 5-7 mm. broad; stipe cream-yellow, nearly equal, or often inflated, glabrous, smooth, 
becoming hollow, 4-12 cm. long, 1-2 em. thick: spores yellowish, elliptic, echinulate, 
8X 1lz. 
TYPE LOCALITY: Sweden. 
HasitaT: In mixed or deciduous woods. 
DISTRIBUTION: Eastern United States as far south as North Carolina, and Missouri; also in 
Europe. 
ILLUSTRATIONS: Cooke, Brit. Fungi p/. 976; Krombh. Abbild. J. 14, f. 17, 18; Lucand, 
Champ. Fr. pl, 166. 
ExsrccaTi: Burl. Lact. N. Am. 77. 
17. Lactaria mucida Burl. Mem. Torrey Club 14: 56. 1908. 
Pileus fleshy, rather thin, convex-umbilicate, then plane, and at length infundibuliform, 
3-9 cm. broad; surface warm-sepia in the center, putty-colored on the extreme margin, 
azonate, very viscid and shining when wet, glabrous; margin even at first, slightly wavy 
and striate in the old plant: context rather lax, white; latex white, drying blue-greenish- 
gray on the lamellae and the broken flesh, acrid; lamellae white, scarcely changing color 
with age, sometimes forking near the stipe, close, adnate to slightly decurrent, acute at 
the inner end, up to 7 mm. broad ; stipe of the same color as the pileus or paler, tapering 
upwards, slightly viscid when wet, glabrous, sometimes with faint striae, stuffed, then 
hollow, 4-7 cm. long, 7-10 mm. thick at the top, 10-15 mm. at the base: spores white, 
broadly elliptic, echinulate, 7-8 * 8-9.5 4. 
TYPE LOCALITY: Pisgah Forest, North Carolina. 
HaBiTaT: Under hemlocks. 
DISTRIBUTION: Vermont and North Carolina. 
ILLUSTRATION: Mem. Torrey Club 14: 56. f 7. 
ExsiccaTi: Burl. Lact. N. Am. 20. 
18. Lactaria circellata Fries, Epicr. Myc. 338. 1838. 
Agaricus circellatus Fries, Hymen. Eur. 426. 1821. 
Pileus fleshy, convex-umbilicate, then plane, becoming infundibuliform, 3-7 cm. broad ; 
surface gray to neutral-tinted, zoned and streaked with raw-umber, darker in the center, fad- 
ing to gray when old, viscid in wet weather, glistening when dry, glabrous; margin even, 
inrolled and pruinose at first, then spreading: context firm, white, or grayish next the 
cuticle; latex white, unchanging, acrid; lamellae white to cream-colored, becoming ochra- 
ceous on the bruised edges, forking near the stipe, close, adnate with a decurrent tooth, 
appearing more decurrent with age, up to 5 mm. broad; stipe paler than the pileus, equal 
or tapering downwards, glabrous, smooth, firm, stuffed, at length hollow, up to 4 cm. long, 
10-17 mm. thick: spores white, subglobose, slightly echinulate, somewhat hyaline, 6.5 
7-8 pf. 
TYPE LOCALITY: Europe. 
HABITAT: In moist mixed woods. 
DISTRIBUTION: Vermont; also in Europe. 
ILLUSTRATIONS: Batt. Fung. Hist. p/. 27, f. D> Cooke, Brit. Fungi p/. 990 ; Gill. Champ. Fr. 
pl. 380; Sow. Engl. Fungi p/. 203. 
ExsiccaTr: Burl. Lact. N. Am. 18. 
19. Lactaria hysgina Fries, Epicr. Myc. 373. 1838. 
Agaricus hysginus Fries, Syst. Myc. 1: 67. 1821. 
Pileus fleshy, convex, then umbilicate, becoming depressed in the center, 5-8 cm. 
broad ; surface reddish-incarnate or blood-red-brown, darker in the center, shading into 
