Pyrus. ROSACEA. 39 



116. Cercocarpus parvifolius, Nutt. 

 Mountain Mahogany, 



California, — valley of the Klamath River, southward through the 

 Coast Ranges to the Sau Bernardino and San Jacinto Mountains; Lower 

 California; Rocky Mountains of Wyoming, Colorado, and New Mexico, 

 mountains of southern Arizona, and southward into Mexico. 



A small tree, rarely G to 9 metres in height, with a trunk sometimes 

 0.30 metre in diameter, or more often a shrub ; dry, gravelly soil, reach- 

 ing its greatest development on the mountains of southern New Mexico 

 and Arizona at an elevation of 6,000 to 8,000 feet. 



Wood very heavy, hard, close-grained, compact, difficult to work, sus- 

 ceptible of a beautiful polish ; medullary rays numerous, thin ; color 

 bright reddish brown, the sap-wood light brown ; furnishing valuable 

 fuel. 



117. Pyrus coronaria, L. 

 American Crab. Sweet-scented Crab. 



Valley of the Humber River, and shores of Lake Erie, Ontario, south- 

 ward through western New York and Pennsylvania to the District of 

 Columbia, and along the Alleghany Mountains to central Alabama and 

 northern Mississippi ; west to southern Minnesota, Iowa, eastern Kansas, 

 the Indian Territory, and northern Louisiana. 



A small tree, rarely 6 to 9 metres in height, with a trunk often 0.30 

 metre in diameter ; rich, rather low woods, reaching its greatest develop- 

 ment in the valleys of the lower Ohio region. 



Wood heavy, rather soft, not strong, very close-grained, checking badly 

 in drying ; medullary rays numerous, obscure ; color brown varying to 

 light red, the sap-wood yellow ; used for levers, handles of tools, and in 

 turnery. 



118. Pyrus angustifolia, Ait. 



American Crab Apple. Southern Crab Apple. 



Pennsylvania(?), southern Delaware, and the valley of the lower 

 Wabash River, Illinois, south to western Florida. 



A small tree, 6 to 9 metres in height, with a trunk rarely 0.30 metre 

 in diameter ; low, rich woods ; common and reaching its greatest devel- 

 opment on the bottom-lands of the South Atlantic States ; less common 

 west of the Alleghany Mountains. 



Wood heavy, hard, close-grained, checking badly in drying ; medullary 

 rays numerous, obscure ; color light brown tinged with red, the sap-wood 

 yellow ; used for levers, handles of tools, etc. 



