Heimia
 Heimia is a genus of flowering plants in the loosestrife family Lythraceae. It contains two or three species of closely related shrubs commonly known as sun opener or shrubby yellowcrest. They are native to the Americas from northern Argentina north to the southernmost United States (southern Texas). The leaves are 2–5 cm long and 1 cm broad entire and variably arranged alternate opposite or whorled on the stems.