60 BOTANICAL GAZETTE [july 



Station 4. 



Noon stop made at point where the river cuts into the Sonora 

 mesa above "Noche Buena" cut-off; observations made at a point 

 corresponding to Station 3, with similar vegetation. 



Jan. 31 1:45 p.m. 72 F. 15$ rel. hum. 



Station 5. 



Camp on dry shore in Baja California among willows, poplar, and 

 saltbush, with numerous beaver slides along bank. 



Feb. 1 7:00 p.m. 50 F. 30^ rel hum. 



" 1 8:30 " 44 " 66 



" 2 6:30 A. m. 41 " 59 " 



Station 6. 



Group of adobe buildings at Colonia Lerdo, on margin of gravel 

 mesa sloping gradually to the delta, 2 km from stream, among mes- 

 quite, saltbush, and arrow-weed. 



Feb. 3 11:40 A.M. 78 F. i6# rel hum. 



"3 1:30 p.m. 81 " 11 



" 3 4:i5 " 79 " IO-5 " 



Station 7. 



Camp on eastern shore of river at Colonia Lerdo, among poplar, 



willow, cane, and tulc, 25'" from margin of water and 2 m above 



surface. 



Feb. 5 7:25 p. m. 



" 5 7M5 



" 5 2:10 



The data given below were obtained at a number of points on the 

 plain and mountains, near camp on San Felipe Bay, Baja California. 



