Fittonia verschaffeltii

Fittonia verschaffeltii is a terrestrial, rather low-growing plant from the South-American tropics. Different varieties are in cultivation; the species name is mostly applied ot a variety with red-veined leaves.
This is not an aquarium plant, even though it is often sold as one. Under water, it dies off and rots away sooner or later. However, it is a great ground cover for moist, warm terraria, bottle gardens etc. The substrate should be rich in humus, loose, slightly moist but not wet. Normal potting soil is suitable. The plant grows a shallow root system and thus does not need a thick substrate.
Please see Fittonia verschaffeltii 'Argyroneura', too.