Please go through the following literature to know the answer

S. R. Ramesh (1990). Studies on the Flora of Kolar District, Ph.D. thesis, University of Mysore, Mysore.

One way of identifying the pre-mining flora from the Kolar gold field exists in historical photos from the very early days of systematic mining.

Please find attached some examples of original recordings of the Kolar gold field taken around the 1900's.

Because of your experience, you may be able to identify some of the trees and shrubs.

Good luck.

Best regards,

G. Grundmann

Please go through the following literature to know the answer

S. R. Ramesh (1990). Studies on the Flora of Kolar District, Ph.D. thesis, University of Mysore, Mysore.

@Guenter: Many thanks for sharing the photos. They would be asset for me.