any of several shrubby plants (genus Plumbago) of a family (Plumbaginaceae, order Plumbaginales) of dicotyledonous plants grown for their ornamental white, blue, or red flowers, esp. in warm climates
Origin:
lead + wort
See leadwort in American Heritage Dictionary 4
noun
Any of various chiefly tropical plants of the genus Plumbago, having clusters of variously colored flowers.