Normally grown as a potted houseplant, nerve plant (Fittonia spp.) is a spreading evergreen perennial with delicately veined, deep-green, ovate leaves. Although the most popular vein color is silvery-white, you can also readily find varieties with veins in red, pink, white, and green. Fittonia typically grows to a height of 3 to 6 inches with a trailing spread of 12 to 18 inches.