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Key to Pine Species 1 |
| COUPLET 1 |
Needles in bundles of 5 |
Needles in bundles of 4 or less |
| COUPLET 2 |
Cones on a long stalk; cone scales thin and flexible |
Cones on a short stalk or sessile on the branch; cone scales thick and not flexible.
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| COUPLET 3 |
Found only in eastern North America
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Found only in western North America
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| COUPLET 4 |
Needles with white lines on all surfaces of the needle; cones 11 to 18 inches long
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Needles with white lines, but not on their outer (dorsal) surfaces; cones 5 to 9 inches long
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