ACER SACCHARUM, Marsh. 

 Sugar Maple. Hard Maple. 



Size. Average 70 to 80 ft. by 2 to 3 ft. Maximum 125 ft. by 5 ft. 



Growth. Somewhat slow growing but persistent and long-lived. 

 Studies in Michigan and New York showed growths of 5 inches in 60 to 

 68 years; 10 inches in 110 to 122 years; and 18 inches in 203 years. 



Root System. Shallow, tracing. 



Bole. Short and cylindrical. 



Crown. Spreading and dense. 



Tolerance. Very tolerant. Shade is advantageous to the growth 

 of seedlings. 



Wood. Heavy, strong, dense, and hard but not durable in contact 

 with the soil ; 43 pounds. 



Reproduction. Fairly prolific with full seed years at intervals of 

 3 to 5 years. Vitality and germination percent medium. 



Range. Newfoundland to Georgia extending westward to Mani- 

 toba, Nebraska and Texas. A tree of medium to low altitudes. 



Climate. Temperature extremes within its range are -50 to 105 

 Fahr.; precipitation varies from 25 to 55 inches as a mean annual. 

 Cool, moist climate is most suitable. 



Soil. Cannot maintain itself on poor, dry soil. Mesophytic. 



Association. Generally grouped and associated with beech, bass- 

 wood, elms, hickories and oaks. 



General. Most valuable of maples; used for shade planting and 

 sugar producing as well as for lumber. 



ACER SACCHARINUM, L. 

 Silver Maple. Silver Leaf Maple. White Maple. 



Size. Average 70 to 90 ft. by 2 to 3 ft. Maximum 120 ft. by 5 ft. 



Growth. Very rapid for the first 50 years but is not very per- 

 sistent. Studies in Nebraska (11 trees) showed growths of 6 inches in 

 19 years and 9 inches in 40 years. 



Root System. Heart. 



Bole. Cylindrical and of medium length for hardwoods. 



Crown. Medium spreading. 



Tolerance. Moderately tolerant, but less so on uplands. 



Wood. Hard, brittle, perishable; 32 pounds. 



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