8(1 Imi-i.i. Mam ai 



7. Ltavts longer than wide, slightly ^-lohed at the outer 

 t'lul, usually only \ery slightly lobcd at the lower 

 cud. nut glaucous hclow ; hark of twigs green or 

 grayish ; racemes erect : a shruh, rarely a small tree. 

 A. spicafiiiii: 



7. Leaves as broad or broader than long, prcniinently 



•"(-lobed. glabrous and dark green above, pubescent 

 and light glaucous below, on long reddish petioles: 

 bark of twigs reddish-brown: racemes ilroopin;^': 

 wings of fruit pul)escent. moderatel\ spreading: a 

 large tree. - /. pseudo-plataniis. 



8. Leaves usually deeply o-lobed, lobes slender, acute. 



white and glaucous beneath; notches l)etween the 

 lobes often somiewhat rounded ; fruiting ])edicel 

 short and stiff. 1-2 in. long; wings divergent : petals 

 none. A. saccharinum. 

 ^. Leaves sharply- ."{-^ lobed. whitish glaucous beneath. 

 notciies acute: fruiting pedicel hjng. slender and 

 drooping. 2-4 in. long; wings incurved; petals 

 present. ,L ruhniin. 



1. .leer plotauoides L. Norway Maple. A medium- 

 sized tree with a broad rounded crown, with brown twigs 

 and milky' sap. Leaves sharply •''t-7 lol)ed. \er\- dark green 

 above. Much cultivated. 



1. .'leer psendo-pU'itanns L. Sycamore Maple. .\ line tree 

 with spreading branches. Leaves (leepl\ ;>-") lolted. Self- 

 prunes. Much cultivated. 



.!. Acer pennsylvanicum !.. Strii)e(l Maple. .\ -mall 

 tree with smoothisli green bark striped with darker lines. 

 Leaves broadest above the middle, thin, glabrous above slightly 

 I)ubescent l)eneath when young, truncate or somewhat cordate 

 at the base. -M-lobed near the apex. Wood white and soft. In 

 rocky soil. X. .S. to Lake .Superior, and along flu' mountains 

 to (ia. and Tenn. 



\. Acer spicatum Lam. Mountain Maple. .\ shrub 

 or small tree, the bark green Ijut not striped. Leaves •"{-'">- 

 lobed. the lobes acute or acuminate, glabrous above. pul)escent 

 beneath at least when young. In damp rocky woods. Xewf. 

 to Man., south to \. Car.. Tenn.. Minn., and Iowa. 



