JOURNAL 
OF 
The New York Botanical Garden 
VoL. VI. June, 1905. No. 66. 
BOTANICAL EXPLORATIONS IN ARIZONA, SONORA, 
CALIFORNIA AND BAJA CALIFORNIA. 
. L. Britton, DirEctor-in-CuI 
The following report of field ene in the valley and 
delta of the Colorado River and the Cucopa Mountains including a 
region lying partly within the United States and partly in Mexico 
is presented. In 1904 a descent of the Colorado to its mouth 
s made and a landing effected on the western shore of the 
Gulf of California, by which many new facts were obtained as to 
the phytogeography and flora of the region and several unde- 
scribed species added to the living collections in the garden. 
(See JourNAL for May, 1904.) 
The recent trip was planned to examine part of the valley of the 
Colorado River between northern Arizona and the Gulf of Cali- 
fornia, which has been but little visited by botanists since the earlier 
railway surveys. In accordance with this scheme, I left New York 
March 9, 1905, arriving at Mellen, Ariz., March 13 at eed 
having been joined by Mr. G. G. Copp, of New York, enrou 
The only building at noe place ay of the telegrapher’s quar- 
ters, and the camp outfit was put into use at once. On the follow- 
ing morning we were joined by Mr. Stanley Sykes, of Flagstaff, 
Ariz., who had by arrangement reached the place a few days 
previously and built a small wooden row-boat with which to 
pilot the expedition down the river. A canvas boat, twelve feet 
in length, and of broad beam had been included in our outfit in 
New York and the forward end was fitted with a large collapsible 
91 : 
