240 
Journal of Mycology 
[Vol. 12 
willing to call my material by either of these names, and temporarily 
designating this rust as Puccinia philibertiellicola I referred the matter 
to Dr. J. C. Arthur who gave the name as used on this label, stating in 
a letter dated August 14, 1906, as follows: “I have it on the same host 
collected by Pringle in Oaxaca, Mex. There is considerable difference 
in the habit and appearance of the different collections and on different 
hosts, but I find no constant morphological characters with which to 
separate them. I have provisionally, however, assorted my material under 
two names P. Gonolobi, where the fungus is in small groups, and P. 
Cynanchi, where it spreads evenly over the surface, often extending along 
the young shoots as they grow, and sometimes forming witches’ brooms. 
I have the former on five, and the latter on nine different hosts.” (J. C. 
Arthur.) 
6. Puccinia heterospora B. <5c C. 
On Sida cordifolia L. 
Gualan (alt. 122 m. 400 ft.) Dept. Zacapa, Guatemala, Central 
America. March 12, 1905. 
W. A. Kellerman, No. 4323. 
The host was identified by John Donnell Smith, and the determina¬ 
tion of the fungus verified by J. C. Arthur. This is a widely distributed 
species in warm, temperate and tropical countries, occurring in Africa, 
India, China, Australia, the Philippines as well as in the American con¬ 
tinent. Reported hosts are numerous. The variations are considerable; 
“Man ist leicht geneigt, wenn man die extremen Habitusformen vor 
sich hat, dieselbe darauf hin in mehrere Arten zu zerlegen; dass Pucc. 
heterospora veilleicht auf Grund von Kulturversuchen noch in mehrere 
Species zu trennen ware, mochten wir eher verneinen als bejahen” 
(Sydow. Monogr. Ured.) 
7. Puccinia rosea (D. & H.) Arthur. 
On Ageratum conyzoides L. 
San Felipe (alt. 615 m., 2050 ft.), Dept. Retalhuleu, Guatemala, 
C. A. Feb. 4, 1906. 
W. A. Kellerman, No. 5446. 
The host species was observed at several places in Guatemala, on 
the Pacific slope. The plants were abundantly affected with this Rust, 
which has been identified by Arthur and Kern as given above. The 
vitality of the host is more or less impaired by the parasite. The Rust 
has been collected heretofore by E. W. D. Holway in southern Mexico, 
on several species of Eupatorium and on Ageratum corymbosum and 
Ageratum strictum. 
