Effect of essential oils on the coagulation of the human plasma induced by Bothrops and Lachesis snake venoms after previous incubation of Lachesis muta, B. moojeni and B. atrox (50 μg/mL) snake venoms at 37°C with different volumes of essential oils extracted from rhizomes and leaves of H. coronarium , followed by addition of citrated human plasma. (A) Lachesis muta inducing clotting. (B) Bothrops moojeni inducing clotting. (C) Bothrops atrox inducing clotting. Means followed by the same letter, in uppercase for comparison between the essential oils analyzed and in lowercase to compare volumes of the same essential oil, do not differ significantly at 5% probability by the Scott-Knott test.