| The plants in this age also switched over to gymnosperms instead of being Cycads. |
| Archegonia occur in most gymnosperms except Gnetum and Welwitschia, but they are lacking in all angiosperms. |
| Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes. |
| The known flora consists of 41 ferns and fern allies, 3 gymnosperms, 291 monocots, and 516 dicots. |
| These data suggest that the enzyme is well conserved in plants and could play similar physiological roles in angiosperms and gymnosperms. |
| As in other gymnosperms, the ovule consisted of one megasporangium within a single integument. |
