மரங்களும் மலர்களும்
41 இனங்கள்| படம் | ஆங்கிலம் | සිංහල | தமிழ் | அறிவியல் பெயர் | IUCN | அகணிய |
|---|---|---|---|---|---|---|
| Oakleaf Fern | — | ஆட்டுக்கால் கிழங்கு | Drynaria quercifolia | — | ||
| Oberonia longibracteata | — | — | Oberonia longibracteata | — | ||
| Oberonia mahaeliyensis | — | — | Oberonia mahaeliyensis | — | ||
| Oberonia scyllae | — | — | Oberonia scyllae | — | ||
| Oberonia wightiana | — | — | Oberonia wightiana | — | ||
| Oberonia zeylanica | — | — | Oberonia zeylanica | — | ||
| Obscure Morning Glory | — | — | Ipomoea obscura | — | ||
| Oceanblue Morning Glory | — | — | Ipomoea indica | — | ||
| Ochna jabotapita | — | — | Ochna jabotapita | — | ||
| Ochna lanceolata | — | — | Ochna lanceolata | — | ||
| Odontonema callistachyum | — | — | Odontonema callistachyum | — | ||
| Officinal Breynia | — | செம்பூலா | Breynia vitis-idaea | LC | — | |
| Olax imbricata | — | — | Olax imbricata | LC | — | |
| Old World Diamond Flower | — | — | Oldenlandia corymbosa | — | ||
| Oldenlandia stricta | — | — | Oldenlandia stricta | — | ||
| Oldenlandia umbellata | — | இம்பூறல் | Oldenlandia umbellata | — | ||
| Ophiorrhiza mungos | — | — | Ophiorrhiza mungos | — | ||
| Ophiorrhiza rugosa | — | — | Ophiorrhiza rugosa | — | ||
| ophylus zeylanicus | — | — | ophylus zeylanicus | VU | அகணிய | |
| Opposite Leaf Fig | — | பேய் அத்தி | Ficus hispida | LC | — | |
| Orange Climber | — | — | Zanthoxylum asiaticum | — | ||
| Orange Mangrove | — | — | Bruguiera gymnorhiza | LC | — | |
| Orange Tick-Trefoil | — | — | Hylodesmum repandum | — | ||
| Orange Wild Rhea | — | — | Debregeasia longifolia | LC | — | |
| Orangeberry | — | பூமிப்பழம் | Glycosmis pentaphylla | LC | — | |
| Orangefruit Passionflower | — | — | Passiflora vesicaria | — | ||
| Orchid Tree | — | மந்தாரை | Bauhinia purpurea | LC | — | |
| Orchid Tree | — | மலையாத்தி | Bauhinia variegata | LC | — | |
| Oriental Blechnum | — | — | Blechnum orientale | — | ||
| Oriental False Hawksbeard | — | — | Youngia japonica | — | ||
| Oriental Trema | — | — | Trema orientale | LC | — | |
| Osbeckia aspera | — | — | Osbeckia aspera | — | ||
| Osbeckia buxifolia | — | — | Osbeckia buxifolia | — | ||
| Osbeckia lanata | — | — | Osbeckia lanata | — | ||
| Osbeckia muralis | — | — | Osbeckia muralis | — | ||
| Osbeckia rheedei | — | — | Osbeckia rheedei | — | ||
| Osbeckia rubicunda | — | — | Osbeckia rubicunda | — | ||
| Osbeckia walkeri | — | — | Osbeckia walkeri | — | ||
| Osbeckia zeylanica | — | — | Osbeckia zeylanica | — | ||
| Oval-Leaf False-Buttonweed | — | — | Spermacoce latifolia | — | ||
| Oxeye Daisy | — | — | Leucanthemum vulgare | — |
