Its scientific title was derived form two Greek words, "leukos," meaning bright, and "neura," meant "nerve." Euphorbia leiconeura is a perennial flowering plant from the Euphorbiaceae. 2. Let the cutting dry for two to three days. Snake Plants like well-draining earth and should only be watered when it is completely dry. The Snake Plant, unlike most other plants, exchanges oxygen and carbon dioxide only at nights to keep water from evaporating. The leaves of the Snake Plant get darker as they age. As this plant age, its leaves will become darker.