Order 40.— THE MAPLES. 



183 



J%r. 480..Eed Maple lAoer rubrum), a leaf and several samara, Mg.^l. Sngar Maple 

 (Acer 8accharmum\ lea^ flowers, and fruit 



2 A. rubrum. Bed M. Swamp M. Leaves lobed, cordate at base, paler beneath. 



Petals linear-oblong. Ovaries and fruit smooth. 40 to lOOf. Flowera red. 



8 A. sacchari'nnm. Rock M. Sugar M. Leaves cordate, 5-lobed, with deep, 



rounded openings between. Bark light gray. g-y. , 

 4 A. ni'grnm. Black M. Sugar-tree. Leaves cordate, with the sinus closed, 

 roundish, with 3 broad, shallow lobes. Bark dark gray. y. 



5 A. spicatnm. Mountam-Bush M. Eaoemes erect, thyrse-like. Shrub 10-15f. 



high, in clumps. Bark gray. Leaves 3-5-lobed. g. 



6 A. Pennsylvan'ieum. SMped M. Whistle-wood,, Bacemes drooping. Tree small, 



with striped bark (green and black). Leaves 8-lobed. g. 



7 A. Fseudo-Plat'anus. Sycamore M. Eaoemes long, drooping. A large tree, in 



parks. Leaves 5-lobed, broad, rounded. Flowers green. 



