MAMMALS ()K T 1 1 K MEXICAN BOUNDARY. 



95 



Flora of Guadalupe Canyon.— Here the distribution of plant life is 

 as follows: 

 The lives are: 



Pinus cembroides Zuccarini. 



Pinus chihuahuana Engelmann. 



Juniperus monosperma < Engelmann) 

 Sargent. 



Juniperus pachyphlcea Torrey. 



Yucca brevifolia Torrey. 



Juglans rupestris Engelmann. 



snii.r nigra Marshall. 



Salia occidentalis longipes (Anders- 

 son) Bebb. 



siili.r taxifolia Humboldt, Boupland, 

 and Kunth. 



Populus wislizeni (Watson) Sargent. 



Quercus oblongifolia Torrey. 



Quercus arizonica Sargent. 



Quercus emoryi Torrey. 



Other conspicuous plants: 



Selaginella rupestxis (Linn reus) 

 Spring. 



Yucca baccata Torrey. 



Jfolina lindheimeriana (Scheele) Wat- 

 son. 



Dasylirion wheeleri Watson. 



Agave schottii Engelmann. 



Agave palmeri Engelmann. 



Mimosa grahami Gray. 



Erytlirina flabelliformis Kearney. 



Fouquieria splendens Engelmann. 



Rhus toxicodendron Linnaeus. 



Celtis occidentalis Linnaeus. 



('< Itis reticulata Torrey. 



Morus celtidifolia Humboldt, Bon- 

 pland, and Knntli. 



Platanus wrightii Watson. 



Vauqueiinia californica (Torrey) Sar- 

 gent. 



Acacia constricta Bentbam. 



Prosopis sp." 



Sapindus marginatus Willdenow. 



Arctostaphylos pungens Humboldt, 

 Bonpland, and Knntli. 



Bumelia rigida (Gray) Small. 



Fraxinus velutina Torrey. 



Chilopsis linearis (Cavanilles) Sweet. 



Rhus circus Lindbeimer. 



Rhus glabra Linnaeus. 



Mortonia scabrella Cray. 



Vitis arizonica Engelmann. 



Parthenocissus quinquefolia (Lin- 

 naeus) Planchon. 



Cactus (several species). 



Echinocactus (several species*. 



Opuntia i several species). 



Ibervillea lindheimeri (Cogniaux) 

 Greene. 



Baccharis glutinosa Persoon. 



Station Xo. 25. — San Bernardino Ranch. Camp was made at 

 Monument Xo. 77. in a mesquite flat between the Sun 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 Sun 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 meadow- beloTS 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 bigb as 1,623 meters (5,325 feet), extending through 

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

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



