| 1 | Adult leaves normally bent at least slightly forward at the apex, tapering from at least the centre of the leaf; pollen cones at least 17 mm long. |
| 1' | Adult leaves often not bent forward at the apex, the sides parallel for most of their length; pollen cones no more than 13 mm long. |
| 2 | Adult leaves linear-lanceolate, sun leaves at least 20 mm long, not glaucous; pollen cone 2.5-3.5 mm diam |
| 2' | Adult leaves mostly lanceolate, sun leaves 13-20 mm long, glaucous; pollen cone 1.5-3 mm diam. |
| 3 | Adult leaves weakly keeled if at all, 2-3.5 mm wide, 12-20 mm long |
| 3' | Adult leaves distinctly keeled on their broader surfaces, 1-2.5 mm wide, 18-35 mm long |
