Senna spectabilis: Tamil Nadu’s Drive to Clear the Invasive Tree
Why in the news
Tamil Nadu began one of India’s biggest invasive-species clearances, targeting every forest division by March 2026 to restore biodiversity.
Key facts
- Plant: Senna spectabilis, fast-growing, yellow-flowered, family Fabaceae.
- Native range: Brazil, Argentina, Paraguay, Bolivia, Peru, Venezuela.
- Invaded areas: Nilgiris, Mudumalai, Sathyamangalam, Anaikatty and other Western Ghats forests.
Traits
- Height 7–18 m with dense canopies; pods 15–30 cm.
- Leaves show nyctinasty, closing at night.
- Likes full sun, tolerates poor soil, spreads through abundant seeds.
Ecological harm
- Monocultures crowd out native plants.
- Less fodder for elephants and deer.
- Dry biomass raises fire risk.
- Slows forest regeneration.
Exam angle
- Family: Fabaceae.
- Target date: March 2026.