Jan. 1905 ] Sydow's Monographia Uredinearum, Etc. 
7 
The arrangement of the text and indices is excellent. The 
illustrations are helpful, although usually confined to the teleu- 
tospores and drawn with a freer hand than seems either neces¬ 
sary or desirable. The serial numbering of the illustrations is 
bad. If each one had been given the text number of the species,, 
it would greatly have facilitated their use. 
The most notable advance, which this work shows in the 
grouping of the species, is their segregation according to hosts. 
It can not be said that this method indicates relationship, but 
it is a fine safeguard against the confusion of species having 
teleutospores of similar appearance. The Schroeterian classifi¬ 
cation, based on the number of spore-forms in the species and 
their behavior, was wisely discarded. 
No one believes that such a work can be perfect; errors 
must necessarily creep in, due to many causes, even if, as in the 
present case, every reasonable care has been exercised by the 
authors to insure accuracy. The following notes upon the Am¬ 
erican species are not to be taken, therefore, as a criticism of the 
work, but as a contribution to the subject. Much of what is here 
given has been learned through recent studies, and constitutes 
heretofore unpublished information. The species are taken up 
in the order adopted in the work, and the text numbers are 
retained for ready reference. 
No. 6. PUCCINIA CORNIGERA E. & E. should be made 
a synonym of P. Actinellae (Webb.) Syd. 
No. io. PUCCINIA LONGIPES Lagh. should be made a 
synonym of P. Vernoniae Schw. This name is founded upon 
an error. Schweinitz described P. bullata from dead stems 
“variarum plantarum v. c. Ambrosiae, Chenopodii” (Syn. Fung. 
Car. p. 74), which statement was copied by Link (in Linne, Sp. 
pi. 6 2 :75). In his later work (Fungi of N. Amer. p. 295) 
Schweinitz gives the host for this species as “Vernonia novaebor- 
acensis,” a correction which Lagerheim and others seem to have 
overlooked. This caulicolous form of the species with its extra¬ 
ordinarily large sori is not infrequently collected, but almost 
always on dead stems, where the contrast of color makes it 
conspicuous. No rust has ever been found on the stems of either 
Ambrosia or Chenopodium. 
No. 13. PUCCINIA APLOPAPPI Syd. is a synonym of 
P. tuberculans E. & E. The differences noted by the author are 
only the natural variation of the species, due to changed environ¬ 
ment. 
No. 17. PUCCINIA SIMILIS E. & E. is a synonym of 
P. Absinthii DC. The aecidia described are undoubtedly a part 
of the species. No aecidia are described under P. Absinthii, 
although this stage belongs to the species. 
