Flowering plants
6 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Hedyotis lessertiana | — | — | Hedyotis lessertiana | Endemic | ||
| Henckelia wijesundarae | — | — | Henckelia wijesundarae | Endemic | ||
| Horsfieldia iryaghedhi | — | — | Horsfieldia iryaghedhi | CR | Endemic | |
| Hortonia angustifolia | — | — | Hortonia angustifolia | CR | Endemic | |
| Hortonia floribunda | — | — | Hortonia floribunda | Endemic | ||
| Hydnocarpus venenatus | — | — | Hydnocarpus venenatus | Endemic |
