Also known as barrenwort, bishop’s hat, fairy wings, and horny goat weed,  epimedium is a carpeting perennial. Native to woodlands in Asia and the Mediterranean regions, these spring-blooming plants grow well under trees, and in shade and rock gardens, adding a burst of spring color to the landscape. Most will fill in a desired space over time through the slow spread of woody rhizomes, without taking over the garden or crowding out other desired plants. Epimediums work well as ground cover plants in partially shaded areas where other plants may fail to grow.