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Pine Key 4 |
| COUPLET 15 |
Cones arcuate (curved), 1 to 2 inches long; species of boreal and Canadian Zone forest of the northeastern United States and most of Canada except for the far west
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Cones not arcuate or curved; generally not with this distribution although Red Pine and Pitch Pine may occur in the same areas of the northeastern United States.
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| COUPLET 16 |
Species of western North America (map is one example species) |
Species of eastern North America (map is one example species)
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| COUPLET 17 |
Needles in bundles of 2 |
Needles in bundles of 3 (if bundles of 2 occur, bundles of 3 needles will also be found on the same tree)
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| COUPLET 18 |
Cones asymmetrical and oblique on one side |
Cones not asymmetrial nor oblique on one side
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| COUPLET 19 |
Needles 1.5 to 2.75 inches long; widespread in western North America, but not found in coastal California
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Needles 4-6 inches long; found in coastal northern and central California and Santa Cruz and Santa Rosa Islands
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