I wish to say that I consider the following two publications of mine which served the botanical community well and were well received by scientists who work on flowering plants of India.

1. Florae Indicae Enumeratio: Monocotyledonae. S. Karthikeyan, S.K. Jain, M.P. Nayar & M. Sanjappa. Botanical Survey of India. Calcutta. 1989. 
2. Flowering Plants of India: Dicotyledons. Volume 1 (Acanthaceae – Avicenniaceae). S. Karthikeyan, M. Sanjappa & S. Moorthy. Botanical Survey of India. Kolkata. 2009.