Known as butterworts (Pinguicula), these plants have microscopic tentacles covering their leaves. While the tentacles are small, if you were to run your finger across leaf, it would feel like it were covered in mucus. Any small flying insect to land on the leaf would get stuck and suffocate before a pool of digestive acids forms under prey and liquifies it.
Many are found in Europe, north Asia, America, and Central and South America. In fact, the most northern growing CP and the most southern growing CP are both butterworts (found in extreme arctic and the southern most point of South America)