588 



NATURALIST'S GUIDE TO THE AMERICAS 



aridity, allied in part to the same zone 

 (landscape aspect similar) in southern 

 California and in part to the same zone 

 in Sonora, but many floral and faunal 

 elements differing from both. 



Plants 



Covillea glulinosa, creosote bush, go- 



bernadora. 

 Idria columnaris, cirio. 

 Fouquieria splendens, ocotillo. 

 Pachycormus discolor, elephant wood. 

 Simmondsia californica, goat nut. 



Mammals 



Odocoileus hemionus eremicus, desert 

 mule deer. 



Antilocapra americana peninsularis, 

 Lower California antelope. 



Eutamias merriami meridionalis, Lower 

 California desert chipmunk. 



Thomomys bottae russeolus, San Angel 

 pocket gopher. 



Dipodomys platycephalus, Calmalli kan- 

 garoo rat. 



Dipodomys agilis peninsularis, penin- 

 sula kangaroo rat. 



Sylvilagus bachmani exiguus, Lower 

 California brush rabbit. 



Birds 



Lophortyx californica vallicola, valley 

 partridge. 



Melopelia asiatica mearnsi, western 

 white-winged dove. 



Dryobates scalaris eremicus, San Fer- 

 nando woodpecker. 



Centurus uropygialis breivsteri, Brew- 

 ster's woodpecker. 



Colaptes chrysoides brunnescens, San 

 Fernando flicker. 



Otocoris alpestris enertera, Santa Rosalia 

 horned lark. 



Toxostoma cinereum mearnsi, Mearn's 

 thrasher. 



Toxostoma lecontei arenicola, desert 

 thrasher. 



Amphispiza belli cinerea, gray sage 

 sparrow. 



Pipilo fuscus aripolius, desert towhee. 



c. San Diegan District (Upper Austral 

 Zone). Western mainly brush-covered 

 slopes of Sierra Juarez and San Pedro 

 Martir Mountains from sea level to 

 about 5000 ft. altitude. The extension 

 of the Upper Austral Zone to sea level 

 is here due to coastal influences. It is 

 interrupted to the southward by Lower 

 Austral plains and low mountains but 



reappears on the upper slopes of the 

 mountains of extreme southern Lower 

 California as indicated by the allied 

 flora and fauna. Biota mainly an 

 extension of that of southern California. 



Plants 



Juniperus californica, California 



juniper. 

 Pinus monophylla, pinyon. 

 Nolina palmeri, Palmer's nolina. 

 Quercus agrifolia, California live oak. 

 Quercus, dumosa, California scrub oak. 

 Quercus palmeri, Palmer's oak. 

 Ribes indecorum, currant. 

 Adenostoma fasciculatum, chamiso. 

 Adenostoma sparsifolium, palo amarillo. 

 Heteromeles arbutifolia, California holly. 

 Aesculus parryi. Parry's buckeye. 



Mammals 



Sorex californicus juncensis, Socorro 



shrew. 

 Onychomys torridus ramona, Ramona 



grasshopper mouse. 

 Peromyscus californicus insignis, Dul- 



zura mouse. 

 Neotoma fuscipes macrotis, large-eared 



wood rat. 

 Perognathus femoralis mesopolius, Lower 



California large-eared pocket mouse. 

 Thomomys bottae nigricans, Stephens' 



pocket gopher. 



Birds 



Balanosphyra formicivora bairdi, Cali- 

 fornia woodpecker. 



Thryomanes bewickii charienturus, San 

 Diego wren. 



Chamaea fasciata henshawi, pallid wren- 

 tit. 



Baeolophus inornatus murinus, San Diego 

 titmouse. 



Psaltriparus minimus minimus, bush- 

 tit. 



Aimophila ruficeps rujiceps, rufous- 

 crowned sparrow. 



Pipilo maculalus atratus, San Diego 

 towhee. 



d. Cape Mountains District {Upper 

 Austral Zone). Mountains of Cape 

 region in extreme southern Lower 

 California. Allied to the San Diegan 

 District of northern Lower California, 

 but separated by hundreds of miles of 

 desert plains and mountains assigned to 

 Lower Austral Zone. 



Plants 



Pinus cembroides, pinyon. 

 Nolina beldingi, Belding's nolina. 



