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Key to Pine Species 2 |
| COUPLET 5 |
Cones scales with long, hooked spines |
Cone scales without long, hooked spines; if spines are present, stout and triangular
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| COUPLET 6 |
Found in montane regions of central Colorado, northern New Mexico, and the San Francisco Peaks region of northern Arizona; cones more elongate (see species description for picture)
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Found in montane regions of east-central California, Nevada, and Utah; cones rounder (see species description for picture)
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| COUPLET 7 |
Cones elongate, cylindrical; needles short (less than 2 inches long) and crowded against the branch resembling a fox tail
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Cones more rounder, ovate; needles usually longer (1.5 to 3 inches long) and not crowded against the branch and not resembling a fox tail
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| COUPLET 8 |
Needles very long (8 to 13 inches); distribution limited to coastal regions of San Diego County in Southern California and Santa Rosa Island.
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Needles much shorter (less than 4 inches long); distribution does not include coastal regions of San Diego County in Southern California or Santa Rosa Island
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| COUPLET 9 |
Species not occurring in central and southern Arizona and New Mexico, or in northern Mexico; cones shorter (6 inches long or less) and ovate |
Occurring in central and south Arizona and New Mexico and northern Mexico; cones longer (6 inches or more) and cylindrical
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| COUPLET 10 |
Cones 3 to 6 inches long; needles on average longer (2 to 3.5 inches), dark or light green; trunk short, but straight
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Cones 1.5 to 3 inches long; needles on average shorter (1.5 to 2.75 inches), dull green; trunk short, twisted or crooked
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Sheaths of needle bundles shed after the first year; bundles with 3 to 5 needles; cones 2 to 2.5 inches long; restricted to mountains of southern Arizona.
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