Figure 1.

Images of Dionaea (a) and (b) and Aldrovanda (c–g). (a) The modified leaves of Dionaea are divided in two parts, the upper (ul) and the lower leaf (ll). (b) The upper leaf has two lobes which centre is brightly coloured red and contains three sensitive trigger hairs (arrows). The free edge of each lobe is lined with spine-like projections or cilia. (a,b) Adapted from [8]. (c) Photograph of a node of an Aldrovanda vesiculosa whorl with eight leaves (photograph © Dr Barry Rice, Sierra College, Rocklin, CA). (d,e) Microphotographs of a trap in open and closed configurations, respectively. The oval lobes are approximately 5 mm long. (f,g) Models of the trap in open and closed configurations, respectively. (d–g) Adapted from [30]. (Online version in colour.)