Corkscrew plants (genus Genlisea) have underground traps, while some carnivorous bromeliads use cup-like traps, such as Brocchinia reducta. Other plants have sticky leaves similar to sundews, including butterworts (genus Pinguicula) and the Portuguese Sundew (Drosophyllum lusitanicum). There are many borderline carnivores, such as the genus Roridula; it traps insects, but, instead of getting nutrients from them, it receives food from the droppings of the insects that eat the trapped bugs. There is an astounding diversity of carnivorous plants, but many species are on the verge of extinction.