Dionaea muscipula, an insectivorous plant of North and South Carolina (see illus.). The two halves of a leaf blade can move as if they were hinged along the midrib and, swinging upward and inward, the two surfaces come together. Any insect alighting on a leaf triggers this sensitive motor mechanism, and is caught between the closing halves of the leaf blade. In this trap, the insect is slowly digested by enzymes secreted by cells in the leaf.