Ludisia Discolor var. Nigrescens is a variety of Jewel orchid with black leaves and a single white line down the center of the leaf. This is different than Discolor as that type has multiple lines down the center of the leaf. These make perfect terrarium plants.
Humidity - 50-80%
Water - Keep consistently moist in a well draining mix
Light - Medium to bright indirect
These plants are in 3” pots.