Flowering plants
109 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Bunchosia glandulifera | Bunchosia glandulifera | — | Bunchosia glandulifera | LC | — | |
| Bunny Ears Cactus | — | — | Opuntia microdasys | LC | — | |
| Burflower-Tree | — | கடம்பு | Neolamarckia cadamba | — | ||
| Burmese-Rosewood | — | — | Pterocarpus indicus | EN | — | |
| Bush Morning Glory | — | நெய்வேலி காட்டாமணக்கு | Ipomoea carnea | — | ||
| Bush Plum | — | சிறு கிளா | Carissa spinarum | LC | — | |
| Bush Sorrel | — | — | Sabdariffa surattensis | — | ||
| Bush Thunbergia | — | — | Thunbergia erecta | — | ||
| Bushveld Moonseed Creeper | — | — | Cocculus hirsutus | — | ||
| Busy Lizzie | — | — | Impatiens walleriana | — | ||
| Butter Fruit | — | வெல்வெட் ஆப்பிள் | Diospyros blancoi | — | ||
| Buttercup Tree | — | — | Cochlospermum vitifolium | LC | — | |
| Butterfly Pea | — | — | Centrosema virginianum | LC | — |
