MAMMALS OF THE MEXICAN BOUNDARY. 



95 



Flora of Guadalupe Canyon- 

 as follows: 

 The trees are : 



-Here the distribution of plant life is 



P'mus cembroides Zuccarini. 



Pinus chihuahuana Engelmann. 



Juniperus monosperma (Engelmann) 

 Sargent 



Juniperus pachypTilasa Torrey. 



Yucca irevifoUa Torrey. 



Juglans rupestris Engelmann. 



Salix nigra Marshall. 



Salix occidentalis loiioipes (Anders- 

 son) Bebb. 



Salix taxifoUa Humboldt, Bonpland, 

 and Kunth. 



Populus wlsUzeni (Watson) Sargent. 



Quercus oblongifolia Torrey. 



Quercus arizonica Sargent. 



Quercus emoryi Torrey. 



Other conspicuous plants: 



Selaginella rupestris (L i n n se u s) 

 Spring. 



Yucca iaccata Torrey. 



Nolina Undheimeriana (Scbeele) Wat- 

 son. 



Dasylirion tcheeleri Watson. 



Agave schottii Engelmann. 



Agave palmeri Engelmann. 



Mimosa grahami Gray. 



Erythrina flahelliformis Kearney. 



Fouquieria splendens Engelmann. 



Rhus toxicodendron Linnaeus. 



Celtis occidentalis Linnseus. 



Celtis reticulata Torrey. 



Morus celtidifolia Humboldt, Bon- 

 pland, and Kunth. 



Platanvs irriglitii Watson. 



Vauqiielinia calif ornica (Torrey) Sar- 

 gent. 



Acacia constricta Bentham. 



Prosopis sp.« 



Sapindus marginatus Willdenow. 



Arctostaphylos pungens Humboldt, 

 Bonpland, and Kunth. 



Bumelia rigida (Gray) Small. 



Fraxinus velutina Torrey. 



Ghilopsis linearis (Cavanilles) Sweet. 



Rhus virens Lindheimer. 



Rhus glabra Linnaeus. 



Mortonia scabrella Gray. 



Vitis arizmiica Engelmann. 



Parthenocissus quinquefolia (Lin- 

 naeus ) Planchon. 



Cactus (several species). 



Echinocactus (several species). 



Opuntia (several species). 



Ihervillea lindheimeri (Cogniaux) 

 Greene. 



Baccharis glutinosa Persoon. 



Station No. 25. — San Bernardino Ranch. Camp was made at 

 Monument No. 77, in a mesquite flat between the San Bernardino 

 Springs and the neighboring San Bernardino River, 310 kilometers 

 (193 miles) from the Rio Grande, at an altitude of 1,133 meters 

 (3,717 feet). The rock is rhyolite and basalt. The San Bernardino 

 River (head of the Yaqui), rising in Arizona, is wooded with willow, 

 Cottonwood, boxelder, ash, and mesquite; a few red junipers grow 

 on the adjacent hills; and the creosote bush, mesquite, acacia, and 

 ocotillo occupy the stony mesas and arroyos which constitute the 

 major portion of the region. The broad meadows below the San Ber- 

 nardino Springs are now covered by grazing herds ; but at the time 

 of Emory's Survey they were occupied by a dense growth of cane, 



<• The Yaqui Basin form of mesquite replaces Prosopis glandulosa Torrey 

 west of the San Luis Mountains, entering Guadalupe Canyon from the Animas 

 Valley. It was found as high as 1,623 meters (5,325 feet), extending through 

 the canyon to the San Bernardino River, where fine mesquite trees were found 

 in the river bottom at the altitude of 1,189 meters (3,900 feet). 



