PAPERS ON BOTANY 163 
Mentions are also made of the more conspicuous of the fungi 
affecting economic plants in various bulletins of the Porto 
Rican Agricultural Experiment Station and reports of the 
Board of Commissioners of Agriculture. 
In addition to the above, reports have been made upon my 
own collections by Arthur, J. C.’; Young, Esther’; Garman, 
Philip’; Stevens, F. L.’ 
Several other articles based on this collection are presented 
at this meeting. 
In the present report are listed only fungi not noted in the 
above mentioned articles. My collections are as yet far from 
being determined, and this list represents merely part of the 
few specimens that have been studied. Unless otherwise indi- 
cated, the specimens were collected by the author, and the num- 
bers given are those of his collection as deposited in the her- 
barium of the University of Illinois. 
For determination of the flowering hosts I am greatly 
indebted to Dr. N. L. Britton and Mr. Percy Wilson; for fern 
determinations to Miss Slosson, for grass determinations to 
Mrs. Agnes Chase. The Hymenomycetes were determined by 
Dr. W. A. Murrill, the Myxomycetes by Dr, T. H. McBride, 
the Ustilaginales by Dr. G. P. Clinton. 
MyxXOMYCETES 
Diachea Fries 
Diachea leucopoda (Bull.) R. on Pitcarmia angustifolia, Sta. 
Ana, 6683; on Pitcarnia sp., Preston’s Ranch, 6705. 
Physarum Pers. 
Physarum sp? on Opuntia sp., Guanica, 320. 
Comatrichia Preuss. 
Comatrichia langa Peck., on (?), Porto Rico, no number. 
Tilmadoche Fries 
Tilmadoche compacta Wing, (probably), Porto Rico, no 
number. 
5. Uredinales of Porto Rico based on collections of F. Stevens, pe 
7: 168-196, 227-255, 315-322; 8: 16-33. Sept., Nov., 1915; oe January, 1916 
6. Studies in Porto Rican Parasitic Fungi, Mycologia, 7: 143-150, May, 1915, 
Studies in Porto Rican Parasitic Fungi II., Mycologia 8:42-46, January, 1916. 
1915, Some Porto Rican Parasitic Fungi I., Mycologia 7: 333- 340, November, 
The Genus Meliola in Porto Rico, Illinois Biological Monographs, No. 4, 
Aprit "1916, and Meliolicolous parasites and Commensals. Botanical Gazette, in press, 
