NATURAL AREAS AND REGIONS 



589 



Populus monticola, huirigo. 

 Quercus devia, encino negro. 

 Ribes brandegei, Brandegee's gooseberry. 

 Heteromeles arbutifolia, California holly. 

 Arbutus peninsularis, Lower California 

 madrono. 



Mammals 



Sorex lagunae, Sierra Laguna shrew. 

 Peromyscus truei lagunae, Sierra Laguna 



mouse. 

 Thomomys bottae alticolus, Sierra Laguna 



pocket gopher. 



Birds 



Balanosphyra formicivora angustifrons, 

 narrow-fronted woodpecker. 



Basilinna xantusii, Xantus' humming- 

 bird. 



Tachycineta thalassina brachyptera, 

 Lower California violet-green swallow. 



Turdus confinis, San Lucas robin. 



Baeolophus inornatus cineraceus, ashy 

 titmouse. 



Psaltriparus grindae, Grinda's bush-tit. 



Sitta carolinensis lagunae, Lower Cali- 

 fornia nuthatch. 



Vireo huttoni cognatus, Frazar's vireo. 



Aimophila ruficeps sororia, Laguna 

 sparrow. 



Pipilo maculatus magnirostris, mountain 

 towhee. 



e. San Pedro Martir District (Transi- 

 tion and Canadian Zones) . Upper slopes 

 (mainly western) of Sierra Juarez and 

 San Pedro Martir Mountains (5000 to 

 9000 ft.) in northern Lower California, an 

 extension, with local modifications, of 

 mountain flora and fauna of southern 

 California. A pine-forested area mainly 

 Transition Zone, but with an infusion 

 of Canadian Zone elements on colder, 

 north slopes of highest peaks. 



Plants 



Abies concolor, white fir. 

 Pinus contorta, lodgepole pine. 

 Pinus ponder osa jeffreyi, Jeffrey's pine. 

 Pinus coulteri, Coulter's pine. 

 Pinus lambertiana, sugar pine. 

 Libocedrus decurrens, incense cedar. 

 Populus trichocarpa, black cottonwood. 

 Populus tremuloides, quaking aspen. 

 Quercus chrysolepis, canyon live oak. 

 Symphoricarpos parishii. 



Mammals 



Scapanus anthonyi, Anthony's mole. 

 Sciurus douglasii mearnsi, Mearns' 

 squirrel. 



Peromyscus truei martirensis, San Pedro 

 martir mouse. 



Odocoileus hemionus californicus, Cali- 

 fornia mule deer. 



Birds 



Oreortyx picta confinis, San Pedro quail. 



Dryobates villosus hyloscopus, Cabanis' 

 woodpecker. 



Sialia mexicana anabelae, San Pedro 

 Martir bluebird. ^ 



Penthestes gambeli baileyae, Bailey's 

 mountain chickadee. 



Sitta carolinensis aculeata, slender- 

 billed nuthatch. 



Sitta pygmaea leuconucha, white-naped 

 nuthatch. 



Nucifraga columbiana, Clarke's nut- 

 cracker. 



Cyanocitta stelleri frontalis, Sierra Ne- 

 vada jay. 



Junco townsendi, Townsend's junco. 



/. Vera Cruz Rain Forest District 

 (Humid Tropical Zone, Tropical Rain 

 Forest). Tropical lowlands and moun- 

 tain slopes from sea level to 6000 to 8000 

 ft. depending upon local conditions, 

 bearing evergreen forest, receiving mois- 

 ture in the form of rain or fog at frequent 

 intervals throughout the year. A typi- 

 cal section includes the northeastern 

 seaward slopes of the Volcano of Orizaba 

 and the Cofre de Perote. Divisible 

 at about 3000 ft. altitude into upper 

 and lower sections which can not prop- 

 erly be characterized in a short 

 account. 



Plants 



Dicranopleris bancroftii, fern. 

 Cyathea tuerckheimii, tree fern. 

 Chamaedorea elegans, palm. 

 Castilla elastica, rubber tree, hule, 



arbol del hule. 

 Talauma mexicana, flor de corazon. 



Mammals 



Sorex macrodon, large-toothed shrew. 



Tayra barbara senex, gray-headed tayra, 

 cabeza viejo. 



Sigmodon hispidus toltecus, Toltec cot- 

 ton rat. 



Reithrodontomys cherriei jalapae, Jalapa 

 harvest mouse. 



Peromyscus nelsoni, Nelson's mouse. 



Oryzomys chapmani chapmani, Chap- 

 man's rice rat. 



Neotoma distincta, Vera Cruz wood rat. 



Heterogeomys hispidus, Jalapa pocket 

 gopher. 



