N

1. Napeanthus - 16

2. Nasturtium - 15

3. Nemacladus - 18

4. Neolepisorus - 16

5. Neomitranthes - 15

6. Neuropeltis - 18

7. Newtonia - 16

8. Nidorella - 17

9. Niedenzuella - 16

10. Niphogeton - 18

11. Nissolia - 19

12. Nordenstamia - 15

13. Noticastrum - 18

14. Notothylas - 16

15. Nuxia - 15