Ferns
10 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Semi-Pinnated Brake | — | — | Pteris semipinnata | — | ||
| Silver Fern | — | — | Pityrogramma calomelanos | — | ||
| Skeleton Fork Fern | — | சைலோட்டம் நூடம் | Psilotum nudum | LC | — | |
| Slender Bracken | — | — | Pteris ensiformis | — | ||
| Small Rasp Fern | — | — | Doodia caudata | — | ||
| Soft Fern | — | — | Christella dentata | — | ||
| South Asian Bracken | — | — | Pteridium revolutum | — | ||
| Southern Sword Fern | — | — | Nephrolepis exaltata | LC | — | |
| Sphaeropteris crinita | — | — | Sphaeropteris crinita | — | ||
| Swamp Shield-Fern | — | — | Cyclosorus interruptus | LC | — |
