THE JOURNAL 



OF 



THE DEPARTMENT OF AGRICULTURE 



OF 



PORTO RICO 

 Vol. II July, 1918 No. 3 



A CHECK LIST OF PORTO RICAN FUNGI AND A HOST 



INDEX.i 



By John A. Stevenson, Pathologist, Insular Experiment Station. 



INTRODUCTION. 



Published information concerning the fungi of Porto Rico is scat- 

 tered through a considerable number of articles, which have been 

 issued to a large extent outside the Island, so as not to be readily 

 available to those attempting the study of this group of plants lo- 

 cally. For this reason it has been considered desirable to compile 

 and present in one publication a list of all fungi reported from or 

 known to occur in Porto Rico, together with the host plants or sub- 

 strata on which the various species occur. For convenience of ref- 

 erence an index to the hosts is also given, as well as a list of such 

 publications on island species as have l)een encountered. 



It is very clearly realized that the species here listed do not by 

 any manner of means represent the complete fungus flora of the 

 Island. The list may rather be considered as a starting point for 

 more intensive work, and it is hoped that the publication and dis- 

 tribution of this preliminary paper may stimulate interest among 

 local collectors, and so bring about important additions to the list. 

 It should be easily possi])le to double the number of species here 

 reported. In fact, the working up of the undetermined material 

 now in the herbarium of this Station will add considerably to the 

 number of species known, and similarly the as yet unnamed por- 

 tions of the collections of Dr. Stevens and other collectors give prom- 

 ise of many species new to the Island. 



History of work with Porto Rican fungi. 



The earliest recorded collection of the fungi of Porto Rico was 

 made in 185-1 by Carl Schwanecke, for tlie most part in the vicinity 



^ Exclusive of the lichens or aliiicolous fungi. 



125 



