| Name | Cassia alata |
| Family | Fabaceae |
| Common names | Ath thora ඇත් තෝර |
| Origin | Introduced – Tropical america |
| Habit | Small tree |
| Climatic zone | |
| NCS | |
| IUCN | Least concern |
| Comment | Wild in disturbed and wet places. Flowers upright. Large leaflets. |
| Reference |
| Name | Cassia auriculata |
| Family | Fabaceae |
| Common names | Ranawara, Avarai, රනවරා |
| Origin | Native |
| Habit | Shrub |
| Climatic zone | Dry, costal dunes, |
| NCS | |
| IUCN | |
| Comment | Common Yala, Wilpattu, scrub. Rounded leaves. |
| Reference | R7 |
| Name | Cassia fistula |
| Family | Fabaceae |
| Common names | Ehela ඇහැල |
| Origin | Native |
| Habit | Small tree |
| Climatic zone | Monsoon forest subcanopy, dry |
| NCS | |
| IUCN | Least concern |
| Comment | T&S 53.36, R7-86 |
| Reference |
| Name | Cassia occidentalis |
| Family | Fabaceae |
| Common names | Peni thora, පැනි තෝර |
| Origin | Introduced |
| Habit | Shrub |
| Climatic zone | Disturbed area, grasslands, |
| NCS | |
| IUCN | |
| Comment | Small shrub, pointed leaves |
| Reference |
| Name | Cassia roxburghii |
| Family | Fabaceae |
| Common names | Rathu wa |
| Origin | Native |
| Habit | Small tree |
| Climatic zone | Dry zone |
| NCS | |
| IUCN | |
| Comment | Drooping branches with small red flower clusters. Former synonym Cassia |
| Reference |
| Name | Cassia spectabilis |
| Family | Fabaceae |
| Common names | Kaha kona, කහ කොන |
| Origin | Introduced – S America |
| Habit | Small tree |
| Climatic zone | Planted, roadsides |
| NCS | |
| IUCN | |
| Comment | Flowers upward spikes, leaflets pointed, no terminal leaflet |
| Reference |
