83 
: second series of some 
2,500 numbers was collected during seventy-one days of the 
summer of 1915. The numbers of the 
Rican College of Agriculture. Th 
b 1 
first series were collected 
in duplicate; those representing vascular plants were sent to the 
New York Botanical Garden and a duplicate placed in the 
arium, and a 
send duplicate of. these has been placed or will eventually be 
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second series is similarly placed except that no specimens have 
been as yet placed in Porto Rico. 
main object has been the collection of parasitic fungi with 
eee 1 attention to the lichens Nias cially the foliicolous 
ba the Hie oue algae, a the saprophytic fungi. 
The 
,000 and 6,000 numbers 
of parasitic fungi. The number of species which they represent 
cannot now even be estimated; but preliminary study shows that 
or extre: 
sacle cane? - undescribed species, some of which are of 
very unique for 
The plant rusts ne the first series, consisting of 650 numbers 
d r0g ae have already been studied by Dr. J. C. Arthur 
and reported u, on in Mycologia; and several genera of leaf-spot 
i di 
eries of collections increases the previous number o 
35 known species to a total of 109 species with the second series 
The smuts, BOWEN EH): seem to bas dees le in number and no 
additions to 
The pacentage of interesting forms in many of the oth 
groups is surely muc’ ume even than is ae by the ae 
a 
tions can reveal ‘ie true ae of the Porto Rican fungous 
flora. 
