[Vor. 1 
08 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Until quite recently this and the preceding species have been 
held to be quite distinct. Of late years the European mycol- 
ogists are coming to believe that they cannot be regarded as 
distinct species. Murrill would separate them оп the ground 
that P. chioneus always has a distinct cuticle which is entirely 
lacking in P. lacteus. Тһе writer has endeavored to keep the 
plants distinct on the basis of the differences noted by Fries. 
If this proves unfeasible then the two must be united as one 
species under the name of P. chioneus, at least with reference 
to their occurrence in this country. 
14. P. galactinus Berk., Hooker’s Lond. Jour. Bot. 6: 
321. 1847. 
Pileus sessile, imbricate or single, dimidiate, 3-7 x 3-7 x 0.5-2 
cm., soft and pliant when fresh, more or less watery, rigid and 
contorted on drying, white, grayish, or somewhat yellowish, 
tomentose to strigose-tomentose, especially at the base, be- 
coming glabrous with age, azonate, margin thin and acute; 
context white or pallid, watery and spongy when fresh, with 
a distinct sweet acid odor, firm when dry, sometimes more 
or less duplex, 8-8 mm. thick; tubes 2-7 mm. long, mouths 
white to bay, often glistening, circular to angular or sinuous, 
minute, averaging about 6 to a mm.; spores white, smooth, 
ellipsoid, 2-2.5 х 3.5-4 ир, uninucleate and with a very trans- 
parent wall. 
Growing on dead wood of deciduous trees. August to 
November. Common. 
The sweet acid odor mentioned in the description is a dis- 
tinguishing character of all collections of this species. No 
mention is made of the odor in any published work to the 
writer’s knowledge, except іп Peck's description of P. immitus 
in which the odor is described as subacid. Р. immitus is in 
all probability this plant. The odor is so constant that whenever 
it is noticed in connection with any minute-pored form of this 
section one can be sure that the plant belongs to this species. 
All of the collections that I have referred to this species 
are watery when fresh, have a sweet acid odor, and when dried 
shrink much in size and often become much contorted. The 
context becomes thin and hard and takes on a resinous, dark 
brown or black color. This appearance may be uniform through 
