PLANTS FROM BAJA CALIFORNIA. 123 



Ignacio, the Santa Clara Mts., a high range, run westward 

 toward Cerros Island, and all drainage from the interior, 

 north of San Ignacio as far as to El Campo Aleman, comes 

 into the San Ignacio Lagoon. El Campo Aleman is on the 

 dividing line between the drainage to San Ignacio on the 

 south and Black Warrior Lagoon on the north. The 

 climate is much warmer on the Gulf coast than on the 

 Pacific. 



In conformity to the physical features, modified by cli- 

 mate and difi'erences of latitude, the flora of the region may 

 be subdivided more or less distinctly as follows: That of 

 the Pacific coast, resembling that of the more northern 

 shores, with some species from the south very abundant, 

 plants that are also found as far north as Florida, on the 

 Atlantic side, such as Laguncularia, Av{ce7inia, BMzophora, 

 Maytemis, etc. ; the Arizona flora comes down the Gulf side 

 and spreads over to the west, south of El Campo Ale- 

 man; the Sonora and Guaymas flora, as represented by Dr. 

 Palmer's collections, will probably be found abundant on 

 the southern Gulf coast, and certainly appears to be well 

 represented in the interior in the same latitude. El Campo 

 Aleman, on the dividing line between northern and south- 

 ern drainage, is a well marked point of separation be- 

 tween the flora of the north and that of the south. The 

 flora north of this place, except on the Gulf coast, resembles 

 that of the region about San Diego. 



Some species, stragglers from a more southern Mexican 

 flora, grow^ in the south, and doubtless many will prove 

 to be endemic to the Peninsula w^ien all the neighboring 

 mainland regions shall have been thoroughly explored. 



No running streams come down the canons and gulches 

 into the Pacific Ocean. The waters that irrigate the gar- 

 dens of Purisima and Comondu disappear as soon as they 

 leave the volcanic rock; and, during the trip northward, 

 \\ ater was found only at few springs and in deep holes in 

 rocks, filled at the time of the rainy season, some of them 



