Germination percent medium to high ; vitality of spring seed transient^ 

 of autumn seed moderately persistent. 



Range. Middle and north of Temperate Zone ; sea-level to 6000 feet. 



Soil. Inhabits a variety of soils from swamps to dry uplands but 

 requires rather moist rich soils to grow timber. 



Association. Gregarious and also in mixture with other hard- 

 woods and conifers. 



General. Of the 70 species known in the world, 13 occur in the 

 United States (4 in Pacific region) and 9 in Canada (3 in Pacific region) . 

 In Canada the maples rank second to birches in commercial importance, 

 and like the birches, the bulk of the cut is supplied by one species, sugar 

 maple. In 1912 maple formed 1.8% of the total lumber cut and 25% 

 of the hardwood cut at an average mill price of $18.91 per thousand. 

 In the United States in 1910 the maples ranked second to oak among the 

 hardwoods and eighth in the total lumber cut with over one billion feet 

 or 2.5% of the total at an average mill price of $16.16. 



ACER MACROPHYLLUM, Pursh. 

 Broad-leaf Maple. Oregon Maple. Big-leaf Maple. 



Size. Varies very greatly in different soils and situations, from 25 

 to 80 feet in height. Form varies also. 



Growth. Medium and moderately persistent. Grows 12 to 20 

 inches in 50 to 85 years. 



Root System. Heart. 



Crown. Spreading. 



Tolerance . Tolerant . 



Wood. Fairly hard and strong; 30 pounds. 



Reproduction. Prolific annual seeder. Flowers in June and 

 ripens in September and October. Germination percent medium; 

 vitality medium. 



Range. Coast of Alaska (south of lat. 55), British Columbia, 

 Washington, Oregon and California (south as far as San Bernardino 

 Mountains). In B.C. it is confined to the islands and seaward side of the 

 coast range. Optimum, Puget Sound. Grows .below 3000 feet in 

 southern British Columbia. 



Climate. Grows best where the humidity is high and the pre- 

 cipitation great. 



Soil. Moist, gravelly and rich humus soils. Mesophytic. 



Association. Grouped in nature; often found with California 

 laurel and lowland fir. 



General. A timber tree of some importance in the Pacific region 

 where commercial hardwood is scarce. 



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