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..2 Leaves borne in fascicles of 2-5 (basally bound by a scarious sheath); [subfamily Pinoideae]
....3 Leaves evergreen; cones 6-12 cm long; [subfamily Abietoideae]
....3 Leaves deciduous; cones 1-2 cm long; [subfamily Pinoideae]
......4 Leaves 4-angled in cross-section; [subfamily Pinoideae]
........5 Leaves jointed, on short, persistent base; cones 1-3.8 cm long, pendent; [subfamily Abietoideae]
..........6 Seed cones erect, disintegrating scale by scale and leaving the cone axis as a persistent spike on the tree; [subfamily Abietoideae]
..........6 Seed cones pendent, falling whole from the tree; [subfamily Pinoideae]