Athyrium otophorum

Athyrium otophorum, the eared lady fern, is a species of fern in the family Athyriaceae, native to Japan and East Asia. It is deciduous and grows in a tufted oval formation to tall and wide. The triangular fronds open pale green before turning grey-green with maroon stems.
Hardy down to it is suitable for cultivation in any moist, partially-shaded spot with good drainage.
In cultivation in the United Kingdom, this plant has gained the Royal Horticultural Society's Award of Garden Merit, as has the variety A. otophorum var. okanum.