( 100 ) 
collections were secured. Porto Rico was also visited in 
the summer by Dr. Marshall A. Howe, Curator, for the 
purpose of obtaining additional representation of the 
marine algae.* All this work was in cooperation with the 
scientific survey of Porto Rico organized by the New York 
Academy of Sciences in cooperation with the American 
Museum of Natural History, the Insular Government of 
Porto Rico, and other institutions. 
In further cooperation with the Carnegie Institution of 
Washington in the investigation of the cactus family prose- 
cuted for several years, Dr. J. N. Rose visited eastern Brazil 
and Argentina during the summer and obtained specimens 
of these plants and of others, which greatly enrich our 
collections; this work was made possible by an appropria- 
tion from the income of the Darius Ogden Mills Fund. 
Dr. J. K. Small, Head Curator, has continued investiga- 
tion of the flora of extreme southern Florida, by the aid 
of funds liberally contributed by Mr. Charles Deering, 
and he is at present engaged in field work there. 
Dr. F. W. Pennell, Associate Curator, spent two months 
of the summer in exploration work in the central Rocky 
Mountains, with special reference to the collection and 
study of plants of the figwort family. Ir. Percy Wilson, 
Associate Curator, continued studies of the local flora in 
Delaware County, New York, during a period of about 
one month. Both these trips were aided by grants from 
the income of the Darius Ogden Mills Fund. 
Preservation of Native Plants 
A further distribution of 30 sets of framed copies of 
colored illustrations of wild flowers needing protection has 
been made to schools, and our supply of these frames has 
now been exhausted. Requests are received for them from 
time to time and it is proposed to obtain an additional 
supply. Competition prize essays on wild flowers needing 
protection were invited from schools in New York City, 
* See Jour. N. Y. Bot. Gard. 16: 219-225. 
