Established on 10th Oct. 1955 with the jurisdiction of Kerala, Tamil Nadu, Pondicherry and the Union Territory of Lakshadweep Islands. This includes the Western Ghats, one of the 25 hotspots of the world and the Eastern Ghats. It has one of the oldest and renowned herbarium – the Madras herbarium besides a national orchidarium and associated garden. The office is situated within the campus of the Tamil Nadu Agricultural University. The Orchidarium and Garden are located at Yercaud in Salem District, about 190 km away from Coimbatore.