Yearbook^ of Agriculture 1949 



29. Silver maple. 30. Red maple. 



31. Boxelder. 



32. White ash. 



Large tree of northeastern quarter of United States and adjacent Canada. Bark gray, 

 becoming deeply furrowed. Leaves paired, heart-shaped, 4 to 5/2 inches in diameter, 

 3-lobed or occasionally 5-lobed, lobes short-pointed and sparingly coarsely toothed with 

 blunt teeth, the sides drooping, dull green above, yellowish green and hairy beneath, 

 turning yellow in fall. Key fruits 1 to l l /4 inches long, maturing in fall. (Perhaps only a 

 variety of No. 27.) 



Principal uses: Same as No. 27. 



SS. Teeth of leaves many and sharp SOFT MAPLES. 



29. SILVER MAPLE, Acer saccharinum L. (soft maple [lumber], white maple, river maple, 

 water maple, swamp maple). 



Large tree of eastern half of United States and adjacent Canada. Bark gray, thin, 

 smooth, on large trunks broken into long, thin scales. Leaves paired, slight heart- 

 shaped, 3 to 6 inches long, deeply 5-lobed, lobes long-pointed, deeply, sharply, and 

 irregularly toothed, bright green above, silvery white beneath, turning yellow in fall. 

 Key fruits 1 /a to 2 l /z inches long, maturing in spring. 



Principal uses: Furniture, boxes and crates, handles, woodenware and novelties, and 

 spools and bobbins. Also distillation products, railroad ties, and pulpwood. Shade tree. 

 Shelterbelts. 



30. RED MAPLE, Acer rubrum L. (soft maple [lumber], water maple, scarlet maple, 

 white maple, swamp maple). 



Large tree of eastern half of United States and adjacent Canada. Bark gray, thin, 

 smooth, on large trunks broken into long, thin scales. Twigs reddish. Leaves paired, 

 heart-shaped, 2/j to 4 inches long, 3- or 5-lobed, lobes short-pointed, irregularly and 

 sharply toothed, dark green and shiny above, whitish and slightly hairy beneath, turning 

 scarlet or yellow in fall. Key fruits ^4 inch long, maturing in spring. 



Principal uses: Same as No. 29. 



PP. Leaves divided into 3 to 1 1 leaflets (compound). 



T. Leaflets attached along the extended leafstalk (pinnate). 



U. Leaflets 3 to 7, sharply toothed, with veins extending to the teeth (fruits 

 paired, clustered, long-winged "kels") BOXELDER (Acer negundo). 



31. BOXELDER, Acer negundo L. (ash-leaf maple, three-leaf maple; Negundo aceroides 

 Moench). 



Medium-sized tree, including its varieties widely distributed across the United States 

 and adjacent Canada. Bark gray or brown, thin, with narrow ridges and fissures. Twigs 

 green. Leaves paired, compound, with usually 3 or 5, rarely 7 or 9, oval or lance-oblong 



