KEY FOR THE IDENTIFICATION OF TREES AND SHRUBS 53 



spiny, petiole set over the lateral 



bud Genus Roblnla 53 



52. Leaf 8-18 Inches long, leaflets 

 yellow-green, serrate, terminal 

 leaflet larger than the paired 



leaflets . . . .Genus Carya 54 



53- Petioles smooth, a large tree. 



Black Locust 

 Robtnia Pseudo-Acacia L. 

 53. Petioles sticky, a shrubby tree. 



Clammy Locust 

 Robinta viscosa Vent . 

 5^. Foliage resinous-scented, margins 

 of leaflets smooth . 



Mocker Nut Hickory 

 Carya alba (L. ) K. Koch. 

 54. Foliage not resinous-scented, 

 margins of leaflets hairy. 



Shagbark Hickory 

 Carya ovata (Mill.) K. Koch. 

 55. Twice -compound, even-pinnate leaves on 

 same tree as once-compound leaves 



Honey Locust . . .See #51 

 55. Twice-compound, odd-pinnate leaves, 

 very large, bronze-green, shining, 

 base of petioles of first degree com- 

 pound leaflets as well as base of main 

 petiole often swollen, lowest leaflets 

 usually undivided. 



Kentucky Coffee Tree 

 Gymnocladus dlotca (L. ) Koch. 



56. Leaves long, slender, needle-shaped 57 



56. Leaves short -needle or awl-shaped 63 



56. Leaves reduced to mere scales 66 



57. Thick or leathery leaves: evergreen, ... 58 



57. Not evergreen, deciduous 62 



58. Needles 2-5 Inches long, in clusters 

 of 2-5, arising from very short 

 twigs or dwarf branches . 



""Genus Plnus 59 



59. Dwarf branches not persistent: 



deciduous, 5 needles in a cluster. 



White Pine 

 Plnus Strobus L. 

 59. Dwarf branches persistent, roughening 

 the bark of the twigs ....... 60 



