32 
positarum forms occurring with the uredo of Puccinia tanaceti , closely 
followed by the teleutospores. The same PEcidium occurs on all five, 
and is invariably followed, if not accompanied, by the uredo and tele¬ 
utospores of this fungus. 
Phragmidium subcorticium occurs, sometimes to an alarming 
extent, on Rosa Arkansana , Rosa blanda (?), and Rosa Sayi. No doubt 
it would do serious damage to cultivated roses in certain localities. At 
Helena in 1887 I found several cultivated varieties more or less affected 
by the cecidium of this fungus. On the wild roses the uredo and tele¬ 
utospores do serious injury, some years destroying the leaves. 
Melampsora salicis is found on nearly all our Willows. I have 
found it abundantly on Salix longifolia , S. cor data, S. amygdaloides , S, 
rostrata , 8. flavescens, and S. glauca. It appears to be most injurious 
to Salix cordata and Salix flavescens. Sometimes in the early fall great 
clouds of the red uredospores are blown from the trees, sprinkling the 
vegetation for some distance around. Last year this Melampsora was 
unusually prevalent and vigorous in its attacks. I found it both sides 
of the main divide of the Rocky Mountains, from the southern border of 
the Territory and the source of Clarke’s Fork of the Columbia River and 
the source of the Missouri River, thence northeastward to within fifty 
miles of the Canadian line. Good sized trees in some localities were 
almost entirely defoliated. On the banks of the Upper Missouri, in one 
locality, were found in September several hundred acres of seedlings of 
Salix amygdaloides and Salix cordata , then from 3 to G inches high and as 
close as grass, which were probably permanently ruined by the uredo 
of Melampsora salicis. The leaves, especially the lower ones, had all 
fallen from the effect of the parasite and were decaying. The upper 
leaves were almost devoid of chlorophyll and evidently perishing. 
Melampsora populina, like the last, was very abundant last year 
and did considerable damage to Populus tremuloides and P. angustifo - 
lia. I also found it ou P. monilifera , P. balsamifera , and P. angulata 
more sparingly. 
Melampsora lini some seasons is ruinous to Linum rigidum, and 
also sharply attacks Linum Leicisii (commonly called L. perenne by 
western collectors). Linum Lewisii is rather similar to the cultivated 
flax, and if the latter were introduced it would doubtless suffer more or 
less from this fungus. 
SPOTTING OF PEACHES. 
By Erwin F. Smith. 
A recent paper on this subject by Dr. J. C. Arthur (Bull. Agr. Exp. 
Sta., Indiana, No. 19, 1S89) leads to the following remarks: 
Cladosporium carpopliilum , v. Thiimen is undoubtedly the conidial 
stage of some well-known ascomj^cetous fungus. It occurs on the leaves 
