Parasitic Fungi of [llinois. 159 
Farlow, and others) that the plant is not generically distinct 
from Uromyces. This being admitted, a further question comes 
upon the specific distinction between the American plant on 
Rhus and the European orie on Pistacea, an allied genus. Ours 
was published in Ravenel’s Fungi Car. Sup. (1855), under the 
names of Uredo toxicodendri, Berk. & Rav., for the uredoform, 
and Pileolaria brevipes, Berk. & Rav., for the teleutoform, and 
the latter name has been commonly used, though the signifi- 
cance of the specific appellation is unintelligible or incorrect, 
for the pedicels are conspicuously long. Upon comparing 
specimens and descriptions of European and- American plants, 
it does not appear that the latter can be maintained as a dis- 
tinct species, hence the name previously given to the former 
has here been adopted (Uredo terebinthi, D. C. Flore Frane. 
[1815], VI, p. 71). The teleutospores are not at all different, 
but in the poor specimens at hand of the European uredo- 
spores, the spiral arrangement of the prominences cannot be so 
well made out; however, Schréter (Hedwigia XIV. [1875], 
p- 170) does not find any difference between them. Doubtless 
there is none. 
It is peculiar that a difference of opinion should exist as to 
which of the forms is the teleutospore. In these specimens the 
yellowish fragile-stalked form appears alone in the collections 
of July, in those of August this is well scattered but present, 
while the thick-walled long-stalked form may be found in sori 
still mostly covered by the epidermis, and later (October) only 
this last is found. 
U. hedysari-paniculati, (Schw.) Farlow. 
II., III. Spots yellow or none; sori amphigenous, scat- 
tered over the whole under surface of the leaf, few above. II. 
Sori small, yellowish brown, scattered; spores subglobose, 
echinulate, 18 by 21 ». ILI. Sori small, compact, soon diffuse 
and confluent, brown or blackish; spores acute or oval, obtuse, 
conspicuously papillate, reddish brown, epispore thick, size 18 
by 214; pedicels broad, slightly colored, slightly curved below, 
twice the length of the spore. 
Sori minute, but thickly scattered over the whole leaf, innate with 
the epidermis. Spores long-pediceled, with the pedicels articulate, pel- 
