Fig. 8. Microindentation experiments on the glandular surface. (A) Force-time curve indicating that the material of the plant sample exhibited visco-elastic properties. Pitcher surface was loaded during the first 15 s (Load), then kept in contact with the upper sample for the next 45 s (Relaxation). (B) The indentation of the sample vs applied force (points). The solid line indicates the fit of the indentation data with the Hertz theory.