VOLUME XXXIX NUMBER 6 
DOTANICAL-. GAZEI Te 
JUNE, 1905 
LEGUMINOUS RUSTS FROM MEXICO. 
J. C. ARprwuR. 
THE following thirty-seven species of Uredinales, represented by 
128 numbered collections, are, with two exceptions, part of the rich 
fruits of three vacation trips into Mexico, made by Mr. E. W. D. 
HOLWAY in 1808, 1899, and 1903. Some of the material secured 
on these excursions has already been reported upon by Mr. Hotway 
in an article in this journal (31: 326-338. 1901), which included 
descriptions of thirty-one new species; a still earlier trip, made in 
1896, was also reported by Mr. Hotway in this journal (24:23-38. 
1897), in which forty-five new species of Uredineae were described, 
the descriptions being drawn by Dr. P. DreTeEt, and with two species 
of ascomycetous fungi, one being the type of a new genus. Much 
material remains to be studied, which will undoubtedly yield many 
more new species. 
The amount of excellent material secured by Mr. Hotway within 
the limited periods at his command shows him to be a collector 
of unusual activity and acumen. His specimens are ample, and 
as a rule contain the various spore stages, or all that could reasonably 
be expected to occur at one season of the year. Another most com- 
mendable feature in making these collections is the care taken to 
Secure the exact determination of the host whenever feasible. Not 
only are bits of the inflorescence and fruit included, but whenever 
the host is in any way unfamiliar, specimens suitable for the phanero- 
gamic herbarium are taken illustrating the foliage, flowers, and fruit 
of the plants as well as possible. These are given the same numbers 
as used for the fungi found on them. They are subsequently sent 
to specialists for determination, by which means accuracy of naming 
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