Proceedings of the Ohio State Academy of Science 167 



nate, coarsely and irregularly dentate, truncate or slightly cor- 

 date at the base, green above, silvery white and more or less pu- 

 bescent beneath. A fine shade tree and much planted. Wood 

 soft and white; used for furniture. Yields a small amount of 

 sugar. iVlong streams. N. B. to Fla.. Ont.. N. Dak., Neb., Okl, 

 and Ohio. 



2. Acer riabrum L. Red Maple. A tree with flaky or 

 smoothish bark and reddish twigs. Leaves sharply 3-5-lobed, 

 the lobes irregularly dentate, acute or acuminate, cordate at the 

 base, green above, whitish beneath. Wood of considerable value 

 when it shows a "curly grain." Leaves crimson, scarlet or yel- 

 low in autumn. Self-pruning like the preceding. In swamps 

 and low ground, also on moist hillsides. X. B. to Man., Fla., 

 Tex., and C)hio. 



3. Acer saccharum Marsh. Sugar ALiple. A large tree 

 with yellow or sometimes red leaves in autumn. Leaves cordate 

 or truncate at the base, 3-7-lobed. the lobes acuminate, irregularly 

 sinuate, dark green above, pale and nearly glabrous beneath. Its 

 sap is the main source of maple sugar and svrup. An average 

 tree will yield 2-10 lbs. of sugar a season. A fine shade tree. 

 The ashes give large quantities of ]:)otash. Wood heavv. hard, 

 strong and tough; used for fuel, interior finish, furniture, keels 

 of boats and ships, im])lements and machinerv, sucker rods, shoe 

 pegs, piano action, school a])])aratus. large wood tvpe, tool and 

 broom handles, and wood carving. Xewf. t(T Man., south to Fla. 

 Tex., and ( )hio. 



4. Acer nigrum Mx. Black Maple. A large fine tree 

 with rough blackish I)ark. Leaves cordate or truncate at the 

 base, 3-7-lobcd, the lo])es broad and short, green on both sides, 

 generally more or less pul)escent beneath. It is equall}- valuable 

 for the making of sugar. Wood much th'j same as in the Sugar 

 Maple, and used for the same purposes. ( )nt. and \'t. to Ga., 

 IMinn., La., Ark., and Ohio. 



5. Acer pennsylvanicum L. Striped Maple. A small 

 tree with smoothish green bark striped with darker lines. Leaves 

 broadest above the middle, thin, glabrous above slightly pubescent 

 beneath when vtnuig. truncate or somewhat cordate at the base. 



