Using a Dichotomous key

-Leaves are not at all needle like or scale like.......3
-leaves opposite...........4
-Leaves simply, deeply 5 lobed like fingers on a hand..........Silver Maple

-leaves are not at all needle like or scale like.........3
-leaves alternate.........5
-leaves simple..........6
-leaves unlobed.........8
-leaf margin toothed (serrate)..........10
-leaf margin with sharp double teeth, leaf shape elliptical, leaf distinctly lopsided at base...... American Elm

-leaves not at all needle like or scale like..........3
-leaves alternate...........5
-leaves simple..........6
-leaves lobed.........7
-outline of leaf circular or nearly so...........Sycamore

-leaves not at all needle like or scale like.........3
-leaves alternate............5
-leaves simple..........6
-leaves unlobed..........8
-leaf margin smooth not touched in any way............9
-leaves are heart or kidney shaped...........Redbud

-leaves are needle like or scale like............2
-leaves small, scale like,close together,overlapping.....Red Cedar