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Epimedium, commonly called barrenwort, bishop's hat, or fairy wings, is a genus of roughly 60 species of rhizomatous, clump-forming perennials native primarily to East Asia, with a few species from the Mediterranean region. Grown for their airy, often spurred flowers held on wiry stems above compound, heart-shaped leaflets, Epimedium is one of the most reliable groundcovers for dry shade, including the difficult conditions found under mature trees and shrubs. New spring foliage frequently emerges tinted bronze or red before turning green for summer, and many selections show bronze or red tones again in fall. Flower color varies widely by species and hybrid, spanning white, yellow, pink, red, and purple, often bicolored. Once established, plants are drought-tolerant, deer- and rabbit-resistant, and spread slowly by rhizomes to form a dense, weed-suppressing mat without becoming invasive. Many gardeners cut back old foliage in late winter, just before new flower spikes emerge, since last year's leaves often persist through winter.
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