Glandular cell evolution is truly unique. These cells in carnivorous plants have evolved to secrete digestive enzymes that help the plants digest prey. Their evolution is thought to have arisen independently in at least six different plant families, including the Droseraceae, Nepenthaceae, Sarraceniaceae, Lentibulariaceae, Cephalotaceae, and Roridulaceae. Not only that, but the glands in different carnivorous plants can be highly specialized depending on the type of prey they capture. For example, the pitcher plants of the Nepenthaceae family have glands that secrete a nectar-like substance to attract prey, while the sundew plants of the Droseraceae family have sticky glandular hairs that trap insects. Their evolution is an example of convergent evolution, where unrelated species evolve similar traits independently in response to similar ecological pressures. Funky Dung this science stuff!