Acer. 



SAPINDACE.E. 21 



61. Acer circinatum, Pursh. 



Vine Maple. 



Valley of the Fraser River and probably farther north in British 

 Columbia, southward through Washington and Oregon, west of the Cas- 

 cade Mountains to the Mount Shasta region of northern California; 

 rarely found above 4,000 feet altitude. 



A small tree, sometimes 8 to 12 metres in height, with a trunk 0.20 to 

 0.30 metre in diameter; borders of streams; the stems often prostrate 

 and forming dense, impenetrable thickets. 



Wood heavy, hard, not strong, close-grained, compact ; medullary rays 

 numerous, thin ; color light brown or often nearly white ; the sap-wood 

 lighter; specific gravity, 0.6660 ; ash, 0.39; used as fuel, by lumbermen 

 for axe and shovel handles, and by the coast Indians for the bows of 

 fishing-nets. 



62. Acer glabrum, Torr. 

 Dwarf Maple. 



Valley of the Fraser River and probably farther north in British 

 Columbia, south through Washington, Oregon, and along the Sierra Ne- 

 vada Mountains of California to the Yosemite Valley ; east along the 

 mountain ranges of Idaho and Montana to the eastern base of the Rocky 

 Mountains, south through Colorado and Utah ; in the east Humboldt 

 Range, Nevada, and in the mountain ranges of western New Mexico and 

 eastern Arizona. 



A small tree, 8 to 12 metres in height, with a trunk sometimes 0.30 

 metre in diameter, or more often reduced to a low shrub 1 to 2 metres in 

 height ; borders of streams, reaching its greatest development in the 

 mountain canons of western New Mexico and eastern Arizona. 



Wood heavy, hard, close-grained, compact ; medullary rays numerous, 

 thin ; color light brown, or often nearly white, the sap-wood lighter. 



63. Acer grandidentatum, Nutt. 



Western Montana, canons of the Wahsatch Mountains, Utah, and 

 south through eastern Arizona to southwestern New Mexico ; and in 

 Coahuila. 



A small tree, rarely exceeding 10 metres in height, with a trunk 0.20 

 to 0.25 metre in diameter ; borders of streams ; not common. 



Wood heavy, hard, close-grained, compact ; medullary rays numerous, 

 thin, distinct ; color light brown, or often nearly white. 



64. Acer saccharinum, Wang. 



Sugar Maple. Sugar Tree. Hard Maple. 



Southern Newfoundland, valleys of the Saint Lawrence and Saguenay 

 Rivers, shores of Lake Saint John, west along the northern shores of the 



