Botanical/Zoological Survey of India

Some points on both of these...

ZSI - HQ - Kolkata - established in 1916
ZSI has 16 regional and field stations:

Eastern - Shillong
Western - Pune
Northern - Dehradun
Southern - Chennai
Central - Jabalpur
Desert - Jodhpur
Gangetic Plains - Patna
Andaman and Nicobar - Port Blair

Marine Biology - Chennai
Fresh Water Biology - Hyderabad
Eastern Biology - Behrampur
Sunderabans - Cannings, West Bengal
Western Ghats - Kozhikode
Marine Acquarium and Research - Digha
Arunachal Pradesh - Itanagar
High Altitude Zoology - Solan

India - Antarctica program from 1989

BSI - formally constituted in 1890 and HQ at Kolkata
Central National Herbarium - Kolkata and started in 1793
The Indian Botanical Garden - Howrah
The Central Botanical Laboratory - Howrah
The Botanical Museum - Kolkata

Regional Circles:
Southern Circle - Coimbatore
Western Circle - Pune
Arid Zone Circle - Jodhpur
Northern Circle - Dehradun
Central Circle - Allahabad
Sikkim Himalayan Circle - Gangtok
Arunachal Pradesh Circle - Itanagar
Andaman and Nicobar Circle - Port Blair

National Orchidarium - Yercaud - Tamil Nadu
National Orchidarium - Shillong - Meghalaya
Mundhwa Botanical Garden - Pune
Dhanikari Arborateum - Port Blair
Sankai Wilderness Area - Itanagar
Gymnosperm Sanctuary - Pauri, Uttar Pradesh