68 LACTARIAE ОЕ THE UNITED STATES 
pileus or paler, subequal but more often tapering upwards, fre- 
quently tomentose at the base, otherwise glabrous, spongy, soon. 
hollow, 3-8 cm. long, 8-16 mm. thick ; flesh white, not changing 
color; spores white, subglobose, minutely echinulate, 5.5-7 И; 
latex white, unchanging, very acrid after a few seconds on the 
tongue. (FIGURE 11.) 
Has. : Under beeches or among beech leaves. July and August. - 
Півтків.: New York, Peck, Earle ; Connecticut, Underwood | 
& Earle; Maine, White ; Vermont, Morgan, Burlingham 13, | 
1006; North Carolina, 1000 meters, Burlingham 105, 1907. 
DISTINGUISHING FIELD-MARKS: The uniform pale-gray color, | 
the thin pileus, which is glabrous, viscid, and usually azonate, but - 
sometimes faintly zonate from the margin half-way to the center, | 
the spongy stem, which usually tapers upwards, and the white: 
close gills, which often become pruinose and do not become | 
stained from the latex. I have found Lactaria cinerea only under 
or in the vicinity of beech trees. In North Carolina I rare | 
failed to find several specimens of it wherever even a solitary | 
beech tree was growing in the midst of the oak-chestnut woods. 
and a few of North Carolina plants were faintly but decidedly 
zonate, the zones being narrow and more prominent toward the. 
margin. Specimens collected by Morgan had this same charac 
teristic. Peck considered the species to be related to Z. vieta | 
and it seems to belong in the group with this rather than with the 
Limacini, where it is placed by Saccardo. Lactaria mucida seems 
to stand between L. cinerea and L. trivialis, but is more closely re- 
lated to the latter by the more acrid milk and the very slimy pileus. 
= 
DOUBTFUL SPECIES 
LACTARIA VIETA (Fr.) Fr. Epicr. 344. 1838. [As Zactarius.] — с 
Schrot. in Cohn, Krypt.-Fl. Schles. 3: 541. 1889 
This species was reported from Ohio by Morgan in his My 
cologic Flora of the Miami Valley, but as the specimens are 
preserved it is impossible to verify the determination. His descrip 
tion would indicate that he had the species which he thought. Е 
. this reason I append the following description : 
