| 1 | Dorsal part of the microsporophyll not at all angled. |
| 1' | Dorsal part of the microsporophyll sharply angled. Spp. 10-11 |
| 2 | Seed scale only slightly angled to completely blunt. Spp. 1-8 |
| 2' | Seed scale with a distinct beak (seed cone small, 5-6 cm diam. by 6-7 cm long). Sp. 9 |
