7G 
Mycologia 
other hosts from Maine and Indiana produced strong infection on 
SoUdago, and in one case a sparing infection also on Aster. In 
the first culture report on the species, the close resemblance be- 
tween this species and the parallel form under Puccinia, that we 
are now calling P. extcnsicola, was pointed out, and in the second 
report the evidence of well defined biological races was adduced. 
Both of these points are further emphasized b}' the cultures here 
reported. 
In this connection an error should be corrected in the report of 
cultures for 1910. Quite anomalous results^® were obtained in 
that year by sowing material of Puccinia quadriporula Arth. from 
Carcx Goodcnozvii from the type locality, upon Aster paniculatus. 
It was at that time pointed out that the resulting aecia were in- 
distinguishable from those of P. Caricis-Asteris Arth. A careful 
re-examination of the culture records has revealed the fact that 
the sowing on April 26, 1910,-’^ was immediately preceded by a 
very successful sowing of Uromyces perigynius on another plant 
of the same species of Aster. The inference is that the supposed 
result from the spores of P. quadriporula in reality came from 
stray spores of U. perigynius accidentally intermixed during the 
operation, and do not represent a culture of P. quadriporula. 
Furthermore, a careful and extended morphological study of a 
number of collections of P. quadriporula, made in different years 
from the type locality and its vicinity, leave no doubt that the form 
should be placed under P. Grossulariae, a Carcx rust having aecia 
on Ribes. The four-pored feature of the urediniospore, from 
which the name is derived, is found to be no more marked than 
in some other collections proven to be a part of that species. 
9. Uromyces Junci (Desm.)Tul. — It was stated in the report 
of cultures for 1910^® that both Mr. Bethel and Dr. Brenckle held 
the opinion that this species in some one of its forms would be 
found to have aecia on Ambrosia psilostachya. Both gentlemen 
provided material for a test the present season, which verified 
their prediction, as the following record of cultures shows. The 
telial host in each instance was J uncus balticns. 
20 Mycol. 4: 28. 1912. 
2T Mycol. 4 : 21. 1912. 
28 Mycol. 4 : 23. 1912. 
