Aceraceae 185 



In gravelly and stony situations extending 

 from the Valley of the Columbia River at 

 Beavermouth, westward throughout the Sel- 

 kirks, the minute blossoms appearing in the 

 latter part of May; a pretty but very varia- 

 ble shrub in habit and leaf form. 



ACERACE^ 



Maple Family 



Trees or shrubs with watery often saccha- 

 rine sap, opposite, simple and palmately 

 lobed leaves and axillary or terminal, cy- 

 mose or racemose, regular, polygamous or 

 dioecious flowers; fruit of 2 long- winged 

 samaras, joined at the base. 



Acer lab ^ shrub or small tree 6-30 feet 

 rum Torr. high, 2-8 inches in diameter, 

 Smooth smooth throughout except the 



a P e ' scales which are densely soft 



hairy inside. Leaves round cordate with 

 shallow sinus, 2-4 inches broad and near- 

 ly as long, more or less deeply 3 -lobed 



