168 Proceeding's of tJie Ohio State Academy of Science 



3-lobed near the apex. Wood white and soft. In rocky soil. 

 N. S. to Lake Superior, and along the mountains to Ga. and Tenn. 



6. Acer spicatum Lam. Mountain Maple. A shrub. or 

 small tree, the bark green but not striped. Leaves 3-5-lobed, the 

 lobes acute or acuminate, glabrous above, pubescent beneath at 

 least when young. Li damp rocky woods. Newf . to Man., south 

 to N. Car., Tenn., Minn., and Ohio. 



*. Acer plaiauoi'des L. Norway Maple. A medium-sized 

 tree with a broad rounded crown, with brown twigs and milky 

 sap. Leaves sharply 5-7-lobed, very dark green above. Much 

 cultivated. 



*. Acer psendo-pldtaniis L. Sycamore Maple. A fine tree 

 with spreading branches. Leaves deeply 3-5-lobed. Self -prunes. 

 Much cultivated. 



7. Acer negundo L. Boxelder. A small tree with 

 spreading branches and glabrous, sometimes pubescent, green and 

 glaucous twigs. Leaves 3-7 foliate, leaflets ovate or oval. The 

 sap produces a slight amount of sugar. Wood light and of slight 

 value. Along streams. Planted on the prairies for small groves 

 and wind breaks. Vt. to A'lan., Fla., Kan., N. Mex., and Ohio. 



Hippocastanaceae. Buckeye Family. 



58. Aesculus L. Buckeye, Horse-chestnut. 



Trees or shrubs with opposite digitate leaves, and leathery 

 capsules containing large shining nut-like seeds. 



1 . Flowers white, mottled with yellow and purple ; leaflets abruptly 

 acuminate ; winter buds gummy ; capsule spiny ; bundle scars ar- 

 ranged in a curved line. AE. hippocastanum. 



1. Flowers yellow or purplish; leaflets acuminate, more or less abrupt; 



winter buds not gummy; bundle scars arranged in 3 areas. 2. 



2. Capsule spiny, stamens exserted. 3. 



2. Capsule glabrous; stamens not longer than the petals, corolla yel- 



low or purplish. JE. octandra. 



3. Leaflets acuminate, finely serrate, 5-7; a tree. AE. glabra. 



3. Leaflets long-acuminate, unequally serrate, 7-9; a shrub-like small 

 tree. AE. arguta. 



