Flowering plants
30 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Nagbala Crossberry | — | — | Grewia hirsuta | LC | — | |
| Naringi crenulata | — | — | Naringi crenulata | LC | — | |
| Narrow Lashes | — | — | Blepharis integrifolia | — | ||
| Narrow-Leaved Merremia | — | முதியார் கூந்தல் | Xenostegia tridentata | — | ||
| Narrow-Leaved Rattlepod | — | — | Crotalaria montana | LC | — | |
| Native Bougainvillea | — | — | Pisonia aculeata | LC | — | |
| Native Bryony | — | ஐவிரல் கோவை | Diplocyclos palmatus | — | ||
| Neanotis monosperma | — | — | Neanotis monosperma | — | ||
| Neanotis nummularia | — | — | Neanotis nummularia | — | ||
| Needle Bush | — | இசங்கு | Azima tetracantha | LC | — | |
| Neolitsea foliosa | — | — | Neolitsea foliosa | LC | — | |
| Neolitsea fuscata | — | — | Neolitsea fuscata | — | ||
| Nepal Geranium | — | — | Geranium nepalense | — | ||
| Nepal Mahonia | — | — | Berberis napaulensis | — | ||
| Nepal Persicaria | — | — | Persicaria nepalensis | — | ||
| Net-Veined Bladderwort | — | — | Utricularia reticulata | LC | — | |
| Nettleleaf Velvetberry | — | — | Stachytarpheta urticifolia | — | ||
| Neurocalyx calycinus | — | — | Neurocalyx calycinus | — | ||
| Neurocalyx championii | — | — | Neurocalyx championii | — | ||
| New Guinea Impatiens | — | — | Impatiens hawkeri | — | ||
| Nickernut | — | கழற்சி | Guilandina bonduc | LC | — | |
| Niepa Bark Tree | — | — | Quassia indica | LC | — | |
| Night Bells | — | — | Brugmansia suaveolens | EW | — | |
| Night Jessamine | — | செசுட்ரம் நோக்டர்னம் | Cestrum nocturnum | LC | — | |
| Night-Blooming Cereus | — | — | Selenicereus undatus | DD | — | |
| Nilgiri Cap-Flower | — | — | Mitrephora heyneana | LC | — | |
| Nkoba | — | — | Baikiaea insignis | LC | — | |
| Nodeweed | — | — | Synedrella nodiflora | — | ||
| Notched Leaf Soapnut | — | — | Sapindus emarginatus | — | ||
| Nothopegia beddomei | — | — | Nothopegia beddomei | — |
