176 
The class of plants to which I wish to call attention in this connection, 
the fungi, was not included in Dr. Kuntze’s publication of 1891; but in a 
recent supplemental volume he has taken it up; and it is because some 
startling changes are proposed among the genera of rusts, a group of 
plants with which I have lately been working, that it occurred to me that 
the members of this Academy might be interested in seeing how the list 
of plant rusts (Uredinew), which have been published from time to time in 
its Proceedings since 1893, would look when revised in accordance with 
what appears to be a rigid application of the law of priority. The time 
at my disposal has not permitted a thorough re-examination of the no- 
menclatorial history of every species of the list, yet such work as has 
been done appears to necessitate some changes, which in part were not 
contemplated by Dr. Kuntze. Some of these changes have been required 
in order to make the list conform to the Rochester-Madison code, espe- 
cially in recognizing 1753 as the limit for priority, instead of 1737, as 
advocated by Dr. Kuntze, and in permitting specific names of any num- 
ber of syllables, instead of limiting them to eight syllables. It has also 
been necessary to revive the genus name Avregma, established by Fries 
(Obs. Myec., p. 225) in 1815, to replace the more familiar name of Phrag- 
midium, published by Link in 1816. 
The plant rusts of our region fall into two principal groups—the 
Melampsoracee and the Pucciniacee. The four genera of the first group 
are not affected by Dr. Kuntze’s researches, but three of the seven genera 
of the second group are altered, and these are much the largest genera of 
all the Uredineew. They are Puccinia, which is changed to Dicwoma; 
Uromyces, changed to Cwomurus and Gymnosporangium, which unfortu- 
nately is to be known as Puccinia. By these changes sixty-nine species 
of rusts belonging to the Indiana flora, out of a total of eighty species 
native to the State, are provided with unfamiliar names. 
Puccinia first appears as a genus, subsequent to the priority limit of 
1753, in a work published by Adanson in 1763, being adopted from a much 
earlier work by Micheli, who founded it to receive the common European 
Juniper rust, now called Gymnosporangium juniperinum.* Other authors, 
*Since the manuscript of this paper went to the printer the correctness of Dr. Kuntze’s 
interpretation of the generic use of Puccinia has been called in question by Professor Mag- 
nus, with Dr. Kuntze’s subsequent approval. Lut the criticism does not apply, it seems to 
me, when 1753 is accepted as the limit of priority, instead of 1737, as held by the German 
writers. « 
