× Osmunimunda nipponica (Makino) X.Wan & Li Bing Zhang, comb. nov.

Basionym: Osmunda × nipponica Makino (1912: 385) ≡ “ × Osmuntonia nipponica (Makino) Hong M.Liu, Schuettp. & H.Schneid. ” (2020: 999), nom. inval.

Type:— JAPAN. Kodzuki: summit of Peak Koruhi of Mt. Akagi, August 1909, F . Uhara s.n. (TI) .

Notes: This nothospecies is a hybrid between Osmunda japonica Thunberg (1780: 209) and Claytosmunda claytoniana (Linnaeus 1753: 1066) Metzgar & Rouhan in PPG I (2016: 594) (Tsutsumi et al. 2011). It occurs in sub-alpine and has a close resemblance to Osmunda bipinnata Hooker (1857: pl. 9) of Hongkong in the frond (Makino 1912).

Distribution: Japan.