Figure 7.
Comparative kinematics of closing and opening motions in adult and seedling traps. Note the different time scales indicated. The adult trap closes very rapidly and performs a sudden geometrical change (snap buckling, indicated by dashed grey lines), whereas the much slower closing of the seedling trap is a very continuous process without any noticeable acceleration. Opening traps also move very continuously, indicating that no reverse snap-buckling takes place either in the adult traps or in the seedling traps. The normalized distance d* is calculated as ratio of d, the remaining distance between the lobes measured for various phases of closure, over dmax, the distance between the lobes in the fully open trap.