38 ROSACEA. Prunw. 



113. Prunus ilicifolia, Wulp. 

 Islay. 



California, — Coast Ranges from San Francisco Bay south to the 

 southern boundary of the State, extending to the western slopes of the 

 San Bernardino and San Jacinto Mountains. 



A small evergreen tree, often 9 to 12 metres in height, with a trunk 

 0.30 to 0.00 metre in diameter, or in the interior often reduced to a low 

 shrub. 



Wood very heavy, hard, strong, close-grained, checking in seasoning, 

 satiny, susceptible of a beautiful polish, containing many regularly dis- 

 tributed, rather small, open ducts ; medullary rays numerous, thin ; color 

 bright reddish brown, the sap-wood .much lighter; furnishing valuable 

 fuel. 



114. Vauquelinia Torreyi, Watson. 



Arizona, — high mountains of the Gila Valley, summits of the Santa 

 Catalina Mountains ; in Sonora. 



A small tree in the Santa Catalina Mountains, 4 to 6 metres in height, 

 with a trunk 0.10 to 0.20 metre in diameter; dry slopes and rocky bluffs 

 between 2,700 and 4,000 feet elevation, in granitic soil ; generally hollow 

 and decayed. 



Wood very heavy, hard, very close-grained, compact, susceptible of a 

 beautiful polish ; medullary rays numerous, thin ; color rich dark brown 

 streaked with red, the sap-wood yellow. 



115. Cercocarpus ledifolius, Nutt. 

 Mountain Mahogany. 



Cceur d'Alene Mountains, Idaho, southward along the western slopes 

 of the Rocky Mountains of Montana and Wyoming; eastern extremities 

 of the Blue Mountains of Washington and Oregon; Wahsateh Mountains, 

 Utah, and west along the mountain ranges of the Great Basin to the west- 

 ern slope of the Sierra Nevada of California, extending southward into 

 Arizona and New Mexico. 



A small, low tree, rarely 12 metres in height, with a trunk sometimes 

 0.G0 to 0.90 metre in diameter, or north of Utah and Nevada reduced to 

 a low shrub; dry rocky mountain slopes, between 6,000 and 8,000 feet 

 elevation, reaching its greatest development on the high ranges of central 

 Nevada. 



Wood very heavy, hard, close-grained, compact, brittle, difficult to 

 work, susceptible of a beautiful polish; medullary rays very numerous, 

 thin; color bright clear red, or often dark rich brown, the sap-wood 

 clear yellow ; furnishing the most valuable fuel of the region, and largelj 

 manufactured into charcoal. 



