MAPLE FAMILY, Aceraceae 



All Maples have winged seeds in pairs. 



100. Mountain Maple, Acer spicatum. Leaves 2 l / 2 - 



4 in. long, 3-5 lobed, white-downy beneath. Its dis-^k'j 

 tinguishing mark is a coarsely-toothed leaf with a tri- 

 angular-shaped middle lobe. (N. E.) 



101. Sugar Maple, Rock Maple, Acer saccharum. 

 Leaves 3-6 in. long, 3-5 lobed. The leaves of the Sugar 

 Maple are lobed but not toothed, which distinguishes it A 

 from all but the Black Rock and Norway Maples. Its 

 leaves differ from those of the Black Rock in being 

 smooth and thin; from the Norway in the absence of 

 milky sap in the leaf stalk. (G.) 



102. Black Rock Maple, Acer saccharum nigrum.!^) 

 Leaves 5-6 in. long, 3 lobed, very thick, edges wavy but 

 not toothed. The only maple whose leaves have green 

 hairy under surfaces. (G.) 



103. White Maple, Soft Maple, Silver Maple, Acer 

 saccharinum. Leaves 4-8 in. long, deeply 5 lobed. The 

 White Maple may be known by two leading character- 

 istics; deeply cut leaves with silvery-white under sur- 

 faces. (G.) 



104. Red Maple, Acer rubrum. Leaves 3-4 in. long," 

 3 sometimes 5 lobed. The distinguishing mark is a 

 finely-toothed leaf with a middle lobe whose edges are 

 parallel near the base of the lobe. (G.) 



105. Norway Maple, Acer platano'des. Leaves 3-5^ 

 in. long, lobed but not toothed. The Norway Maple^ 

 might easily be mistaken for the Sugar Maple were it 

 not for the fact that it is the only member of the family 

 which has milky juice in its leaf stalk. (I.) 



106. Sycamore Maple, Acer pseudoplatanus. ^k 

 Leaves 3-5 in. long, 5 lobed. This tree may be readily^ 

 recognized by its thick coarsely-toothed leaves which are 

 dark green above and whitish beneath. (I.) 



107. Box Elder, Ash-leaved Maple, Acer ncgundo. 

 Leaves pinnately compound (see note page 8), Leaflets A 

 2-4 in. long. The only maple whose leaves are compound, ^^ 

 whose fruit remains attached during the winter, and 

 whose leaf scars meet around the twig. (G.) 



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