92 
Journal of Mycology 
¥ 
P eridermium cerebrum. 
[Vol. 12 
The original specimens from New York were on Pinus 
rigida. It has also been collected on this host in New Jersey by 
Ellis (N. A. F. No. 1022) and by the writer. It is reported in 
Farlow and Seymour’s “Host Index” as occurring on P. pondero- 
sa. In Mohr’s “Plant Life of Alabama” it is reported on P. taeda, 
P. echinata and P. Vir giniana. There are specimens of a Peri¬ 
dermium from Mississippi and Texas in the pathological collec¬ 
tion of the Bureau of Plant Industry, Department of Agriculture, 
which also appear to belong to this species. Its distribution, ac¬ 
cording to the records and specimens at hand, is from New York 
to Texas. 
Cronartiu m Q u erciturn. 
This is given by Farlow and Seymour as occurring on the 
following oaks: Quercus coccinea, Q. nigra, Q. tinctoria - Q. 
ajelutina, and Q. virens-Q. vir giniana. There are specimens in 
the pathological collections of the Department of Agriculture on 
Q. velutina, Q. Vir giniana, Q. coccinea and Q. macrocarpa (Fun. 
Col. No. 198). We have found it about Washington on Quercus 
velutina, Q. coccinea, Q. Marylandica, Q. Phellos and Q. Prinus. 
We have collected it in New Jersey on all the species last men¬ 
tioned, except Q. Prinus, and also on the following additional 
species not before reported: Q. alba, Q. digitata, Q. nana and Q. 
minor . Its distribution, so far as indicated by the specimens seen, 
is from Pennsylvania and New Jersey to Mississippi and Texas. 
There are also specimens from Minnesota. Of course, if the con¬ 
nection between these two forms is correct, their distribution 
should be practically identical. 
NORTH AMERICAN SPECIES OF HELIOMYCES. 
A. P. MORGAN. 
HELIOMYCES Le'ville Champ, exot. Am. Sc. Nat. 1844. 
Pileus coriaceous - or membranaceous - tremellose, plicate- 
sulcate or rugulose. Stipe central, tough, cylindric, hstulose, 
Lamellae similar in substance to the pileus, the edge acute; spores 
white. 
Small Agarics which are tremelloid when fresh and growing, 
and when dry have the appearance of Marasmii. Only about a 
dozen species have been described and these are very imperfectly 
known; the spores are recorded in but one or two species. The 
genus is certainly a very interesting one and worthy of the atten¬ 
tion of students; but the species must be observed and described 
in their fresh and growing state, since they change their appear- 
