| 1. Leaf ± 4-angled, with 2 obvious, whitish bands on each surface |
| P. engelmannii |
| 1' Leaf ± flat, with 2 faint, whitish bands on upper surface, sometimes also lower surface |
| |
| 2. Leaf tip blunt; seed cone scale margin ± entire, bract < 1/4 scale |
| P. breweriana |
| 2' Leaf tip acute; seed cone scale margin ± jagged, bract > 1/2 scale |
| P. sitchensis
|