Japanese flowering fern, Asian royal fern (Osmunda japonica)

Osmunda japonica is a species in the Osmunda genus. It is commonly known as Japanese flowering fern, Asian royal fern This name is accepted name for the species in the family Osmundaceae . . This species is found in Assam, China North-Central, China South-Central, China Southeast, East Himalaya, Japan, Korea, Kuril Is., Myanmar, Nansei-shoto, Nepal, Pakistan, Sakhalin, Taiwan, Thailand, Tibet, Vietnam, West Himalaya.