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| 1 | Leaves scale-like or needle-like, < 1.5 cm long, not in fascicles; seed cone scales valvate or imbricate, if imbricate then leaves opposite and scale-like; seeds 1−3 per scale | Cupressaceae |
| – | Leaves needle-like, (10−) 12−45 cm long, in fascicles of 2−3 leaves; seed cone scales imbricate; seeds 2 per scale | Pinaceae [Pinus] |
Key adapted from Eckenwalder and Thieret (1993).
