Okumawarabi - Okumawarabi

...It is also known in Korea, and there is a similar species in Taiwan. A closely related species found in Japan is Okumawarabi D. uniformis (Makino) Makino, but it can be distinguished by the fact that the leaves are usually single-pinnate and deeply lobed, there are many lateral pinnae (12-20 pairs), the scales are dark in color, the pinnae with the sporangium clusters are hardly degenerated or reduced, and the veins are not very concave on the leaf surface. Also, while Kumawarabi often grows in colonies in limestone areas, Okumawarabi is more common in areas with granite. ...

*Some of the terminology that mentions "Okumawarabi" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…朝鮮にも知られており，台湾にはよく似たものがある。日本産の近縁種にオクマワラビD.uniformis (Makino) Makinoがあるが，葉はふつう単羽状深裂，側羽片は数多く12～20対，鱗片は濃色で，胞子囊群がつく羽片はほとんど退化･縮小しないこと，葉脈が葉の表面であまりくぼまないことなどにより区別できる。またクマワラビは石灰岩地帯でしばしば群生するが，オクマワラビはむしろ花コウ岩地域に多い。…

※「オクマワラビ」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報