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Exploration 
The most important exploration trip accomplished was 
that of Dr. and Mrs. J. N. Rose to Peru, Bolivia, and 
Chile for the collection of cacti, in continuation of cooper- 
ation with the Carnegie Institution of Washington in the 
study of these plants. They visited the desert regions of 
these countries and obtained living plants and museum and 
herbarium specimens of most of the many kinds of cacti 
which grow there, and these collections have all been 
received at the Garden, for the most part in capital con- 
dition, forming the most important addition to our cactus 
collections ever made on a single expedition. The Garden’s 
cooperation in this work was effected through an appro- 
priation from the income of the Darius Ogden Mills Fund. 
By the use of the income of the same fund, Dr. J. A. Shafer 
explored the Porto Rico island Vieques in the spring and 
the Naguabo mountain range of Porto Rico in the summer, 
bringing back important collections; this work was in 
cooperation with the New York Academy of Sciences, the 
American Museum of Natural History, and the Insular 
Government of Porto Rico; further cooperation in this 
work was effected by Dr. and Mrs. Britton, accompanied 
by Mr. John F. Cowell and Dr. Frank E. Lutz, who visited 
Porto Rico and the islands of the Mona Passage in Febru- 
ary and March. Dr. Marshall A. Howe visited parts of 
Georgia and northern Florida in January for the collection 
of cryptogams. In late May and early June, Dr. Britton 
continued botanical studies in Bermuda, accompanied by 
Mr. Stewardson Brown and Mr. Peter Bisset. In con- 
nection with the investigation of the flora of the region 
within 100 miles of New York City, prosecuted for several 
years by Mr. Norman Taylor, considerable collecting was 
done at various points by several members of the staff. 
Preservation of Native Plants 
By the aid of the Caroline and Olivia E. Phelps Stokes 
Fund for the preservation of native plants, copies of the 
