Anisocampium niponicum

Athyrium niponicum, the Japanese painted fern, is a species of fern native to eastern Asia. This species was redefined as a member of genus Anisocampium in 2011 based on phylogenetic analyses, but the genus has since been sunk into Athyrium. This deciduous fern has a creeping rhizome and a tuft-shape array of fronds. The fronds are variable in length, generally 30 to 75 centimeters long but occasionally over a meter in length. They have alternately arranged, subdivided pinnae. The spore-bearing sori on the undersides of the fertile pinnae are variable in shape, being "oblong, hooked, J-shaped, or horseshoe-shaped". The Latin specific epithet niponicum means "relating to Japan (Nippon)". This is a commonly cultivated fern, especially A. niponicum var. pictum. It thrives in many kinds of shady garden conditions and produces thick colonies of gray-green fronds with reddish midribs. 'Pictum' is also considered to be a cultivar; varieties and cultivars are bred to achieve midribs in many sh......read more on Wikipedia.