The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various tropical American plants of the genus Caladium widely cultivated for their ornamental foliage, variously patterned in white, green, pink, or red.
"Use light-colored pots, then fill them with white - or pastel-colored impatiens or tuberous begonias and plants with patterned foliage, such as caladium and polka-dot plant."