164 
Mycologia 
Lactaria plinthogala (Otto) Burl, 
Sooty Lactaria 
Plate i6o. Figure 2. X i 
Pileus fleshy, convex to plane, sometimes with a small umbo, 
depressed in the center, then subinfundibuliform, 2^.5 cm. 
broad ; surface raw-umber to dingy-yellow-brown, snuff -brown, 
or putty-colored to pallid, usually darker in the center and at first, 
then fading, dry, glabrous but coyered with a bloom, usually 
very smooth, sometimes wrinkled in the center when mature ; 
margin entire of wavy ; context white, changing to reddish or 
salmon where exposed to the air ; latex white, tardily acrid, rarely 
changing color except when in contact with the broken flesh, 
where it becomes salmon-pink ; lamellae nearly white at first, then 
maize-yellow, becoming pinkish or salmon where wounded, 
pruinose, sometimes forking near the stipe and sometimes con- 
nected with vein-like reticulations, subdistant, adnate or slightly 
decurrent, about 5 mm. broad ; spores yellow, mostly globose, 
echinulate, 6.5-10 in diameter; stipe of the same color as the 
pileus, often whitish at the base, nearly equal or tapering down- 
ward, glabrous, pruinose, stuffed but firm, then hollow, 5-7 cm. 
long, 6-12 mm. thick. 
This species is widely distributed in the eastern United States 
in deciduous or mixed woods. Certain closely related forms are 
sometimes difficult to distinguish, but they all appear to be re- 
garded as edible. 
Cortinellus decorus (Fries) P. Karst. 
Ornamented Cortinellus 
Plate 160. Figure 3. X i 
Pileus thin, rather tough, convex becoming plane or slightly 
depressed, subexpanded, 4-7 cm. or more broad; surface moist, 
melleous, sometimes tinged with flavous, fuliginous at the center, 
dotted with minute, brownish or blackish, hairy squamules, 
margin incurved ; context yellow, watery, mild, insipid, with un- 
pleasant odor; lamellae adnate to slightly sinuate, crowded, 
arcuate, cremeous-flavous ; spores subglobose, smooth, hyaline, 
5-6 X 4-5 /u-; stipe equal, often curved, stuffed or hollow, mel- 
leous, fibrillose or squamulose, especially above, rarely glabrous, 
sometimes eccentric, 2.5-6 cm. long, 4-6 mm. thick. 
