100 OUR FORESTS 



KEY TO SOME OF THE COMMON TREES OF THE 

 NORTHEASTERN UNITED STATES 



The following Key was prepared by George T. Hastings of the 

 Department of Biology of the DeWitt Clinton High School. 



This Key does not include the common cultivated fruit trees, or 

 any but the commonest of cultivated shade or ornamental trees. 



A. Leaves, needle-shaped, or very small, scalelike. Evergreen trees, 



except No. 9. 



Conifers or Soft Woods 



I. Leaves needle-shaped. 



a. Leaves over If inches long, in bundles of 2, 3, or 5. 



1. Leaves 5 in a cluster. 1. White Pine. 



2. Leaves 3 in a cluster. 2. Pitch Pine. 



3. Leaves 2 in a cluster. 



♦Leaves If to 3 inches long. 3. Scotch Pine. 



♦♦Leaves 3 to 5 inches long. 4. Austrian Pine. 



b. Leaves about 1 inch long, many in a cluster on tiny knoblike 



branches. 5. Larch or Tamarack. 



c. Leaves less than If inches long, singly on the twigs. 



1. Leaves flattened, growing horizontally on the twigs. 



*About f inch long. 6. Hemlock. 



** 1 to 1 inch long. 7. Balsam. 



2. Leaves 4 angled, growing on all sides of the twigs. 



♦Leaves dark green, cones 4 inches or more long. 



8. -Norway Spruce. 

 ♦♦Leaves bluish green, cones If to 2 inches long. 



9. White Spruce. 

 II. Leaves scalelike, very small. 



a. Leaves rounded, overlapping, flattened on the twigs, which 



appear as if ironed out flat. Fruit a cone about f inch long. 



10. White Cedar or Arbor Vita;. 



b. Leaves sharp-pointed, on all sides of the rounded or square 

 • twigs. Fruit a small blue berry. 11. Red Cedar or Juniper. 



B. Leaves not needle-shaped or scalelike. 



Broad-leaved or Hardwood Trees 



I. Leaves in pairs, opposite on the branches. 



a. Leaves simple, palmately veined, notched or lobed. 



1. The depressions between the 3 to 5 lobes narrow, acute, 

 twigs red. 



