Dryopteris erythrosora , commonly called Japanese shield fern or autumn fern, is an arching, evergreen (semi-evergreen in cold winter climates) fern that grows in a vase-shaped clump to 2′ tall and as wide. It is native to woodland hillsides and mountain slopes in Japan, China and Taiwan. New fronds unfurl in striking shades of orange-red to copper-pink before eventually maturing to glossy deep green by summer. Triangular, bi-pinnate fronds grow to as much as 2′ long. Hardy to USDA Zones 5-8.