UREDINALES COLLECTED BY R. THAXTER AND 
J. B. RORER IN TRINIDAD: 
J. ©. ARTHUE 
(WITH FOUR FIGURES) 
During a visit to Trinidad extending from December 19, 1912, 
to May 16, 1913, made by Dr. RoraAND THAXTER of Harvard 
University for the purpose of collecting insects and fungi, especially © 
Pyrenomycetes, a number of Uredinales were secured, chiefly in 
the latter half of the period. The island of Tobago was also 
visited for a day in May. This island lies about thirty miles 
northeast of Trinidad, and geographically is to be considered with 
it in a study of the flora. The two islands lie close to the northern 
coast of South America, and in their faunal and floral relations _ 
belong to that continent. 
The Uredinales, consisting of about forty-five numbers, includ- 
ing two from Tobago, were recently submitted to the writer for 
study by THAxTER. They have been found to represent thirty- 
seven species of rusts, and to fall into the unusually large percentage 
of fourteen genera. Two of the species appear to be undescribed, 
and one of these seems sufficiently distinctive to be the type of a 
new genus. 
Little is known of the rusts of Trinidad, and the independent 
publication of this interesting list of species appears to be worth 
while. A few numbers have been added, which were collected in 
1915 and 1916 and sent to the writer by Mr. James B. RoRER, 
Mycologist to the Board of Agriculture of Trinidad from 1909 to 
1918, and earlier assistant in botany at Harvard University. He 
sent four numbers, which show the same high percentage of species 
and genera as those from THAXTER, there being four species, one 
of them a most interesting undescribed form, and three genera. All 
of the species and two of the genera are unrepresented in the 
THAXTER collection. 
t Contribution from the Botanical Department of Purdue University Agricultural 
Experiment Station. 
Botanical Gazette, vol. 73] [58 
