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accessible by additional paths. The encouragement of 
tree planting by example and precept is most important; 
its importance, indeed, has not yet begun to be appreci- 
ated; the necessity oF increasing the supply of forest 
Drodiices is coming to be essential to mankind. 
The greenhouse collections have been increased from 
various sources, and have been carefully maintained. 
Noteworthy additions were made to the representation of 
cacti, especially by a fine series brought by Dr. J. N. Rose 
from northern Venezuela, in continuation of the coopera- 
tion in the study of this group with the Carnegie Institution 
of Washington; Dr. J. A. Shafer, an experienced collector, 
formerly a member of the Garden staff, has been sent to 
southeastern South America to obtain representative cacti 
from the deserts of Paraguay, Uruguay, and western 
Argentina; the success of this expedition will certainly 
make the cactus collections of the Garden the most com- 
plete and important of any in existence. Noteworthy 
additions to the palm collection were contributed by Mr. 
P. A. B. Widener, by Mrs. F. S. Holbrook, and by Miss 
Jean S. Gordon. 
All greenhouse space is now fully occupied and the col- 
lections in some of the houses are overcrowded. It is de- 
sirable therefore that additional houses be constructed at 
conservatory range 2 on the eastern side of the Garden. 
This range of houses will soon become very accessible by 
the opening of the White Plains Avenue extension of the 
subway, with a station at Allerton Avenue, within a few 
minutes’ walk. 
Tris Garden 
At the corner formed by the intersection of the Southern 
Boulevard and Pelham Avenue, where grading and path 
building were commenced in 1915, large collections of irises 
were planted in the spring of 1916. The garden was 
formed by a backing of evergreen trees and deciduous- 
leaved shrubs, with a band of irises nearly 400 feet long, 
faced by spring-flowering bulbous plants, and followed by a 
