any of a genus (Caladium, esp. C. bicolor) of tropical American plants of the arum family, grown for ornament because of their brilliantly colored, variegated leaves
See caladium in American Heritage Dictionary 4
(kə-lāˈdē-əm)
noun
Any of various tropical American plants of the genus Caladium widely cultivated for their ornamental foliage, variously patterned in white, green, pink, or red.