ACERACEAE 



Striped Maple. Moosewood 

 Acer pensylvanicum L. 



HABIT. A shrub or small tree rarely 25 feet high and 8 inches 

 in diameter; striped, upright branches with compact crown. 



LEAVES. Simple; orbicular; shallowly 3-lobed above the 

 middle; 5-6 inches long; sharply doubly toothed; glabrous; 

 yellow-green above, paler below; turning pale yellow in autumn. 



FLOWERS. Usually monoecious; in pendulous racemes; 

 petals bright yellow; appearing after the leaves. 



FRUIT. Key with widely divergent wings % inch long; 

 glabrous; red-brown; maturing in autumn. 



TWIGS. Slender; smooth; red to green-brown; mottled. 

 Winter buds: terminal Yi inch long; bright red; short-stalked. 



BARK. Thin; red-brown to bright green; marked by vertical, 

 broad, white stripes. 



WOOD. Unimportant; rather light and soft; pinkish brown. 



SILVICAL CHARACTERS. Tolerant; cool, moist, shaded 

 sites. 



Mountain Maple 

 Acer spicatum Lam. 



HABIT. A shrub or small tree rarely 35 feet high and 8 inches 

 in diameter; upright branches, forming a compact, rounded 

 crown. 



LEAVES. Simple; orbicular; shallowly 3-lobed (rarely 5- 

 lobed) above the middle; 3-5 inches long; coarsely toothed; 

 dark green and glabrous above, white downy below; turning 

 red to orange in autumn. 



FLOWERS. Polygamous; in erect, terminal racemes; petals 

 yellow-green; appearing after the leaves. 



FRUIT. Key with widely divergent wings Vi-l inch long; 

 glabrous; bright red; maturing in autumn. 



TWIGS. Slender; slightly hairy; red to brown. Winter buds: 

 terminal Vq inch long, bright red, more or less hairy. 



BARK. Very thin; red-brown; smooth or slightly furrowed. 



WOOD. Unimportant, rather light and soft; light brown. 



SILVICAL CHARACTERS. Tolerant; cool, moist, shaded 

 sites but less demanding of shade than striped maple; a com- 

 mon ornamental. 



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