(34) 
During the latter part of January and February a trip to 
the Southwest was made, in the course of which a week was 
spent in conference with Dr. W. A. Cannon concerning the 
researches in progress at the Desert Botanical Laboratory. 
In accordance with arrangements previously made, Mr. G. 
Sykes, civil engineer, of Flagstaff, Arizona, had a small 
sloop constructed at Yuma, Arizona, and on February 27, in 
company with him, Professor R. H. Forbes and an assistant, 
I started down the Colorado River for an exploration of its 
delta and of some of the contiguous desert areas in Lower 
California. A small collection of plants embracing over a 
dozen new species, two of which are trees, was made, and a 
mass of data dealing with the climatic and floristic features of 
the region was accumulated. Some of the results are em- 
bodied in a paper entitled ‘* Desert and Delta Vegetation,” 
published in the Botanical Gazette for July, 1904, and re- 
printed as Contribution 53 of the Garden. 
Respectfully submitted, 
D. T. MacDouveat, 
Assistant Director. 
