Fresh leaves of C. haematocephala were collected in the month of March, in Manipal University precincts, Manipal. The plant was taxonomically identified and authenticated by Ms. Usharani S. Suvarna, Head of the Department of Botany, MGM College, Udupi, India. The leaves were thoroughly washed under tap water to remove the adhered dust particles present on the surface and then rinsed with Millipore-Milli-Q water. The cleaned leaves were completely dried at room temperature on a blotting paper. The dried leaves were chopped into small pieces and stored in an air-tight container at room temperature for further use. The aqueous leaf extract of C. haematocephala was prepared as follows: 10 g of chopped leaves were mixed with 100 mL of water in a 250 mL flask and the contents were boiled for 10 min. The contents were cooled to room temperature and filtered through Whatman No. 1 filter paper. The clear leaf extract of C. haematocephala thus obtained was used for synthesis of silver nanoparticles.