VI TABLE OF CONTENTS. 



List of trees of the Mexican Boundary Line — Continued. Page. 



Populus augustifolia (Narrow leaf cotton wood) 47 



Populus fremontii ( Fremont cotton wood) 48 



Alnus oregona ( Led alder) 49 



Quercus gambelii (Gambel oak) 49 



Quercus brevil< >ba ( Durand oak ) 50 



Quercus undulata (Rocky Mountain oak ) 50 



Quercus engelmanni ( Engelmann oak ; evergreen white < >nk ) 50 



Quercus obi ongifolia (Oblongleaf oak; blue oak) 50 



Quercus arizonica (Arizona white oak ) 51 



Quercus reticulata (Netleaf oak) 51 



Quercus tourney i (Tourney oak) 51 



( Quercus dumosa (California scrub oak ) 52 



< haercus emoryi ( Emory oak) 52 



Quercus chrysolepis (Canyon live oak ) 52 



Quercus agrifolia (California live oak) 515 



Quercus hypoleuca (Whiteleaf oak) 53 



Quercus wislizeni*( Highland live oak) 54 



Quercus texana (Texas red oak) 54 



Quercus californica (California black oak ) 54 



Ulrnus crassifolia (Cedar elm) 54 



Oertis occidentalis ( Hackberry) 54 



rltis reticulata (Palo bianco) 55 



Celtis mississippiensis ( Sugarberry ) 55 



Morus rubra ( Red mulberry) 55 



Morus celtidifolia (Mexican mulberry ) 55 



Umbellularia californica (Calif< »rnia laurel) 56 



Lyonothamnus floribundus asplenifolius (San Clemente ironwood) 56 



Platanus occidentalis (Sycamore) 56 



Platanus racemosa (California sycamore) 56 



Platanus wrightii ( Arizona sycamore) 56 



Vauquelinia californica ( Vauquelinia) 57 



Cercocarpus parvifolius betuloides (Birchleaf mahogany ) 57 



Cercocarpus parvifolius paucidentatus (Entireleaf mahogany ) 57 



Adenostoma sparsifolium (Red-shank chamiso) 57 



Amelanchier alnifolia ( Western service tree) 57 



Heteromeles arbutifolia (Christmas berry) 57 



Primus demissa ( Western choke cherry ) 58 



Prunus salicifolia (Willowleaf cherry; Mexican cherry) 58 



Prunus ilicifolia ( Hollyleaf cherry ) 58 



Prunus integrifolia ( Entireleaf cherry ) 58 



Acacia farnesiana ( Huisache ) 58 



Acacia greggii ( Devils claws ) 59 



Prosopis odorata (Tornillo; screw 1 >ean ) 59 



Prosopis glandulosa ( Mesquite ) 59 



Cercis reniformie (Texas redbud | 60 



Parkinsonia aculeata ( Horse 1 >ean ) 60 



Parkinsonia microphylla (Smallleaf horse bean) 60 



• Cercidium torreyanum ( Palo verde) 61 



Sophora secundiflora ( Frijolillo; C< >ral I »ean ) 61 



Eysenhardtia orthocarpa (Eysenhardtia) 61 



Parosela spinosa (Indigo thorn; mangle) 61 



Robinia neomexicana ( New Mexico locust ) 62 



Olneya tesota (Sonora ironwood; Palo de hierro) 62 



Ptelea trifoliata (II. .ptree ) 62 



