Least concern
19 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Sri Lanka |
|---|---|---|---|---|---|---|
| Hairy Water-Lily | මානෙල් | ஆம்பல் | Nymphaea pubescens | LC | 🌿 Lives in Sri Lanka | |
| Haldu | හාල්ඩු | மஞ்சக்கடம்பு | Adina cordifolia | LC | 🌿 Lives in Sri Lanka | |
| Hammerleaf Frangipani | — | — | Plumeria pudica | LC | 🌿 Lives in Sri Lanka | |
| Hammock Viper’s-Tail | හැමක් වඅයිපර්එස් වලිගය | — | Pentalinon luteum | LC | 🌿 Lives in Sri Lanka | |
| Harlequin Glorybower | හාර්ලක්වන් ග්ලොරිබොව්රෙ | — | Clerodendrum trichotomum | LC | 🌿 Lives in Sri Lanka | |
| Hedyotis fruticosa | හෙඩිට්සි ෆ්රුටිකොසා | — | Hedyotis fruticosa | LC | 🌿 Lives in Sri Lanka | |
| Henna | හෙන | மருதோன்றி | Lawsonia inermis | LC | 🌿 Lives in Sri Lanka | |
| Herb-Of-Grace | ඖෂධීය පැළෑටි අව් ග්රේස් | நீர்ப்பிரமி | Bacopa monnieri | LC | 🌿 Lives in Sri Lanka | |
| Hiptage | හිප්ටාගෙ | குருக்கத்தி | Hiptage benghalensis | LC | 🌿 Lives in Sri Lanka | |
| Holly Mangrove | — | கடல் முள்ளி | Acanthus ilicifolius | LC | 🌿 Lives in Sri Lanka | |
| Homalium ceylanicum | හොමාල්මි කෙලානික්මු | — | Homalium ceylanicum | LC | 🌿 Lives in Sri Lanka | |
| Homonoia riparia | හොමොනඔයිඅ රිපාරි | — | Homonoia riparia | LC | 🌿 Lives in Sri Lanka | |
| Hooded Orchid | හිස්වැසුම් ඕකිඩ් | முக்காடு ஆர்க்கிட் | Dendrobium aphyllum | LC | 🌿 Lives in Sri Lanka | |
| Hooker’s Orchid Cactus | හුකර්එස් ඕකිඩ් කැක්ටස් | — | Epiphyllum hookeri | LC | 🌿 Lives in Sri Lanka | |
| Horse Bush | හෝර්ස් පඳුර | — | Dendrolobium umbellatum | LC | 🌿 Lives in Sri Lanka | |
| Humped Bladderwort | හම්ප්ට් බ්ලැඩර්වර්ට් | — | Utricularia gibba | LC | 🌿 Lives in Sri Lanka | |
| Huntaria | හුන්ටාරි | — | Hunteria zeylanica | LC | 🌿 Lives in Sri Lanka | |
| Hydrolea zeylanica | හිඩ්රොලෙ සෙලානිකා | — | Hydrolea zeylanica | LC | 🌿 Lives in Sri Lanka | |
| Hygrophila balsamica | හිග්රොෆිලා බාල්සාමිකා | — | Hygrophila balsamica | LC | 🌿 Lives in Sri Lanka |
