48 ROCHESTER ACADEMY OF SCIENCE. [March 24, 
and Ceoma. This group is of considerable interest to agriculturists 
on account of the damage done to cultivated plants. Some of the 
species in the list belong to common forms, such as wheat rust and 
corn smut, and others to rare members of the order. Only a few 
‘features can be here noted in a general way. We have found only one 
species of Roestelia ( Roestelia lacerata). These roestelia forms, as proven 
by the cultures of Halsted, Thaxter and Farlow are the ecidia or 
cluster cup stage of species of Gymnosporangtum, or the so-called 
“cedar apples,’ which are found upon species of cedar and juniper. 
The Roestefia of our flora was found upon Cratzgus leaves, but a search 
for the ‘‘cedar apples” upon Juniper has proved fruitless, nor have I 
found evidence of the occurrence of species of Gymnosporangtum in 
Western New York. 
While this review was in course of preparation I noticed along the 
roadside some patches of MWalva rotundifolia whose leaves were spotted. 
A removal of some of the spotted leaves and a microscopic examination 
enables me to announce the unfortunate presence with us of Puccinia 
Malvacearum, or as it is commonly termed, the hollyhock disease. And 
next I examined my hollyhocks and found them attacked. There are 
many features of interest about this parasitic rust. When first reported 
from Australia it was said to be very destructive. It has been recorded 
in this county in scattered localities in Vermont, Massachusetts and 
California, and unfortunately seems to be spreading. It has only 
recently been found in this state. Some specimens were lately sent to 
Prof. Peck, from Geneva, which he has pronounced to be this fungus, 
and in an article in the “Country Gentleman” recommended prompt 
measures to be taken for its suppression ; but it probably has secured too 
firm a foothold to he stamped out. “As far as the attacks on A/alva 
rotundifolia are concerned it may be a good thing, but not so with its 
attacks upon cultivated hollyhocks,” says Prof. Peck in a recent letter. 
Prof. Farlow of Harvard College, has compared our specimens with 
others and pronounced them as the same fungus found in Massachusetts, 
Vermont and Central New York. ‘“ The spots are much lighter colored 
than the Western and California form which is not the true Puccinta 
Malvacearum but Puccinia Malvastri, Peck.” The color of the latter is 
black brown, while that of the former is yellow brown. The depth of 
the apparent color in P. Malvacearum is dependant to some extent on 
the fact of the production of promycelia or not, as this species is a 
member of the sub-genus in which the spores germinate at once 7” situ, 
if the promycelia are just starting the color appears lighter, if they have 
not begun to appear it is somewhat darker. (Sec. Farlow in litt.) 
