1004] MAC DOUG A L— DELTA AND DESERT VEGETATION 53 



The character of the portion of the Colorado desert lying within 

 the state of California is the subject of a recent paper by S. B. Parish, 10 

 and need not be discussed further here. He says, concerning the 

 delta: "the region bordering the Colorado River is too little known 

 to permit exact statements regarding it." 



The arid region of Baja California to the eastward of the main 

 divide covers an area of much greater topographical diversity, but 



with less rainfall probably than the Sonoran slopes across the Gulf, 

 from which its flora is widely different in general composition. My 

 examination of this part of the country was made from San Felipe 

 Bay, which lies about 6o km south of the mouth of the Rio Colorado 

 in latitude 31 N. The western shore of the Gulf between this 

 point and the river is made up of a continuation of the mud-flats of 

 the delta, and has great expanses covered with Cressa and salt grass. 



10 Parish, S. B., A sketch of the flora of Southern California. Bot. Gaz. 36: 203- 

 222, 259-279. 1903. 



