760 TREES OF NORTH AMERICA 



A tree, rarely 20 high, with a short trunk 6'-8' in diameter, and slender terete 

 branchlets light red-brown when they first appear, soon becoming darker and marked 



by scattered pale lenticels, and ashy gray and roughened by the dark elevated lunate 

 leaf-scars in their second year; more often a shrub, with numerous slender spreading 

 stems 6-8 tall. Winter-buds terminal, acute, nearly ^' long, with dark reddish 

 brown glutinous scales. 



Distribution. Rocky slopes and dry ridges; valley of the Rio Grande in south- 

 western Texas and southeastern New Mexico, and southward to the mountain slopes 

 of Coahuila, Chihuahua, and Nuevo Leon; a shrub within the territory of the United 

 States, and probably arborescent only on the mountains of Chihuahua; still very 

 imperfectly known. 



2. Fraxinus Greggii, Gray. 



Leaves l|'-3' long, with winged petioles, and 3-7 narrowly spatulate to oblong- 

 obovate leaflets entire or occasionally coarsely serrate above the middle, with remote 



blunt teeth, slender midribs, and obscure reticulate veins, thick and coriaceous, dark 

 green on the upper, rather paler and covered with small black dots on the lower 



