185 
Recent collections, the study of which has led up to the co- 
yperative arrangement, include principally those made for the 
Paited States National Museum by H. Pittier in Venezuela in 
1913; for the Gray Herbarium by J. A. Samuels in Dutch Guiana 
n1g16, and by H. A. Curran and M. Haman in Curagao, Aruba, 
and northern Venezuela in 1917; and for the New York Botanical 
Barden by H. H. Rusby and F. W. Pennell in ror : 
The ee daar was consummated through correspondence 
between Robinson of the Gray Herbarium and Mr. 
Frederick 7 ae oa Dr. J. N. Rose of the National Museum 
with Dr. N. L. Britton of the New York Botanical Garden in 
i latter part of 1917 and early in 1918, and it has been ap- 
proved by the governing bodies and officials of the three insti- 
tutions. 
Professor Oakes Ames of the Bussey Institution of Harvard 
University has offered codperation which has been gratefully 
accepted. 
The first field expedition organized is one to Ecuador, led by 
Uni t 
Rose, of the States National Museum; in this, 
e cooperating institutions are very materially aided by the 
Bureau of ustry of the United States Department of 
important economic plants which can be obtained only by field 
observations of a trained botanist. Dr. Rose left Washington 
on July 22, for an absence of about four months, and it is antici- 
pated that the results of this work will add greatly to our know- 
dor 
e very large collections made Drs. Ruby and Pennell 
in Colombia for the New York Botanical Garden are being o 
ganized for critical study, and will be divided among the fee 
institutions as soon as possible. 
N. L. Britron 
THE NEW DAHLIA BORDER 
The New York Botanical Garden has long had a few scattered 
dahlias in the general flower-beds north of Conservatory Range 
