ACERACEAE 



BiGLEAF Maple 

 Acer macrophyllum Pursh 



HABIT. A medium-sized tree often 80-100 feet high and 

 3-4 feet in diameter (max. 9 feet) ; narrow, compact crown. 



LEAVES. Simple; orbicular; palmately 5-lobed; 8-12 inches 

 long; lobe margins entire or sparingly wavy-toothed; glabrous; 

 bright green above, paler below; turning bright orange in 

 autumn. 



FLOWERS. Polygamous; in pendulous racemes; petals present, 

 bright yellow, H inch long; appearing with the leaves. 



FRUIT. Key with slightly diverging wings 1 !4-2 inches 

 long; wings densely hairy over seed cavity, nearly glabrous 

 elsewhere; maturing in autumn. 



TWIGS. Stout; smooth; red to green-brown. Winter buds: 

 terminal H inch long, blunt, with 3-4 pairs of red-green, hairy- 

 margined scales. 



BARK. Smooth and gray-brown on young stems; becoming 

 red-brown, deeply fissured and broken into square scales on 

 the surface. 



WOOD. One of few important hardwoods on West Coast; 

 medium hard and strong; veneer, furniture, flooring, etc. 



SILVICAL CHARACTERS. Tolerant; moist sites; fast- 

 growing; wide, shallow roots; vigorous reproduction; a com- 

 mon ornamental. 



* * * 



BiGTOOTH Maple 



Acer grandidentatum Nutt. 



HABIT. A small tree 30-40 feet high and 8-10 inches in 

 diameter. 



LEAVES. Simple; orbicular; 3-5 lobed; 2-5 inches in diam- 

 eter; lobe margins entire or lobulate; dark green and lustrous 

 above, paler and hairy below; turning red or yellow before fall- 

 ing. 



FLOWERS. Polygamous; calyx yellow; petals absent. 



FRUIT. Key with slightly spreading wings V2~l inch long; 

 glabrous or sparingly hairy; green at maturity in autumn. 



TWIGS. Slender; glabrous; bright red. Terminal bud red, 

 Vfe inch long. 



BARK. Thin; dark brown; with platelike scales. 



SILVICAL CHARACTERS. Rather tolerant; moist sites; 

 shallow roots. 



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