Planted Tank Guru
Join Date: Mar 2009
Location: Madison, Wisconsin
You can keep carnivorous plants in a terrarium, but a lot of the best ones don't really like to be in an enclosure and would rather be outdoors.
Another group of plants that is incredibly diverse and so interesting are various miniature orchids, especially pleurothallid orchids from the Neotropics. Many of these kinds of orchids can grow and bloom really well in a humid viv setup.