Arthur: Cultures of Uredineae 
63 
Three weeks of August, 1913, were spent in company with Mr. 
H. C. Travelbee, in northern Michigan in the vicinity of Leland. 
Here very abundant field confirmation was obtained of the cor- 
rectness of the 1913 spring culture work in associating Puccinia 
vulpinoidis with aecia on Solidago, and material was secured for 
repeating the work. 
Two days were profitably given in November, 1913, accom- 
panied by Dr. F. D. Fromme, to an exploration of the Kankakee 
marshes in northern Indiana, and as much time in December fol- 
lowing, accompanied by Mr. C. A. Ludwig, to a reconnoissance 
about French Lick in southern Indiana. 
During February and the early part of March, 1914, an ex- 
tended trip by Dr. Fromme and the writer was made through the 
Southwest. Field work began at Denison, on the northern border 
of Texas. At Denton the localities made interesting to uredini- 
ologists by the extended field work of Mr. W. H. Long were 
visited. Stops on the way southward to Austin, and a divergence 
to Houston and Galveston, gave interesting results. Observations 
in the arid region were made principally at San Antonio and El 
Paso, Texas, the region about the Agricultural College, N. Mex., 
and at Douglas and Tucson, Ariz. At Tucson through tlie 
kindness and material assistance of Dr. D. T. MacDougal and 
his corps of investigators at the Desert Botanical Laboratory, the 
rust flora of the vicinity was examined, and a very important 
culture on Brodiaea was carried to completion. 
The dominant ideas actuating the above mentioned geograph- 
ical explorations are not so much those of the ordinary collector, 
to find new species, but rather those of the student, to secure addi- 
tional knowledge of species already named but imperfectly known, 
and to gather facts bearing upon relationships. 
To indicate the extent of the labor involved in securing the 
results recorded in this paper the following statistics are given. 
During the three seasons covered by this report, 380 collections 
with resting spores, and 68 with active spores were available, but 
scarcely one third of those with resting spores could be made to 
germinate. To test the germinating condition of the spores over 
2500 drop cultures were made. Altogether 650 sowings were 
undertaken upon growing hosts and 84 infections obtained. 
