1. Nabalus albus
2. Najas marina
3. Napaea dioica
4. Narcissus bulbocodium
5. Narcissus jonquilla
6. Narcissus poeticus
7. Narcissus pseudonarcissus
8. Narcissus tazetta
9. Narthecium ossifragum
10. Nauclea orientalis
11. Nemophila aphylla
12. Neotinea ustulata
13. Neottia cordata
14. Neottia nidus-avis
15. Neottia ovata
16. Nepenthes distillatoria
17. Nerine sarniensis
18. Nerium oleander
19. Nicandra physalodes
20. Nicotiana glutinosa
21. Nicotiana rustica
22. Nicotiana tabacum
23. Nigella damascena
24. Nigella sativa
25. Niphidium crassifolium
26. Nothoscordum bivalve
27. Nuttallanthus canadensis
28. Nyctanthes arbor-tristis
29. Nymphaea alba
30. Nymphaea lotus
31. Nyssa aquatica

Nerium oleander

• Oleander  (Nerium oleander)

• Insufficient research to evaluate efficacy.<wiki/List_of_medicinal_plants#cite_note-oleander-167"> Used for muscle cramps, asthma, cancer, and <wiki/AIDS" title="AIDS">AIDS.<wiki/List_of_medicinal_plants#cite_note-168"><wiki/List_of_medicinal_plants#cite_note-oleanderc-169">
• Oleander leaf is poisonous, and can cause fatal heart failure. Symptoms may include nausea, vomiting, colic, appetite loss, dizziness, drowsiness, high potassium levels, dilated pupils, bloody diarrhea, seizures, loss of consciousness, slow or irregular pulse, and heart block.<wiki/List_of_medicinal_plants#cite_note-oleanderc-169"> Oleander seeds are also toxic, as is the rest of the plant, sap, twigs, roots, etc.<wiki/List_of_medicinal_plants#cite_note-oleander-167">