ict te tl sien 
MourriLL: PoLyrporacEAE oF NortH AMERICA 115 
have been obtained. It is truly rimose like R. Rodiniae, but dif- 
fers decidedly from the latter in pore-structure and context, while 
the spores are larger and less globose. It would be quite remark- 
able if a group of plants from such widely separated localities did 
not show specific differences. 
P. Robiniae is abundant in the southern United States on 
Robinia and extends with it as far north as Connecticut and west 
to Missouri and Texas. I have not as yet seen it upon any other 
host, but a plant recently collected by Earle in Jamaica on Acacia 
emarginata, nearly related to Robinia, seems not specifically dis- 
tinct from it. When Rodinia was introduced into France several 
centuries ago from Virginia this fungus must have been introduced 
with it, since it was collected there by F. Fautrey in November, 
1891, growing on Robinia. The specimen is at Upsala and is 
labelled P. igniarius. Among the many collections examined 
from America, the following may be mentioned: Massachusetts 
(Underwood); New York (Underwood, Earle, Murrill); New 
Jersey (Ellis); Ohio (James, Morgan, Lloyd); West Virginia (Nut: 
tall); Virginia (Miss V. W. Murrill) ; Alabama (Underwood, Atkin- 
son, Earle). 
A good account of the destructive effects of this plant is given 
by H. von Schrenk in Ann. Rep. Mo. Bot. Gard. 12: 21-31. fv. 
F~3, 1901. 
7. Pyropolyporus praerimosus sp. nov. 
A large ungulate plant with plane brown hymenium and a very 
timose blackish surface. Pileus woody, rounded ungulate, 8-12 
X 7-10 X 8-11 cm.; surface exceedingly rimose after the first 
year, broadly furrowed, the projecting ridges splitting away in 
age, very dark brown to black; margin obtuse, velvety, rusty to 
hoary : context corky to woody; concentrically banded, fulvous, 
0.5 cm. or less thick ; tubes indistinctly stratified, 1-2 cm. long 
each season, 3 to a mm., concolorous within and without with the 
context, mouths rounded to polygonal, ochraceous at first, capes 
rather thick, obtuse, becoming thin and often splitting in age: 
Spores globose, smooth, deep ferruginous, 3-4; spines ferru- 
ginous, 10-17 X 5-104, largest at the base. 
Collected by Earle, July, 1900, on Quercus undulata in the El 
Capitan Mountains, New Mexico, at an altitude of 7,000 feet. 
Related to P. Everhartii (El. & Gall.). 
