Polystichum

...An evergreen perennial fern of the Dryopteris family common in warm areas south of Yamagata Prefecture (illustration). The rhizome is thick and upright, with many leaves growing in a funnel-shaped cluster. The leaves are narrow lanceolate to oblong, bipinnately compound, with the lower pinnae slightly retrograde. The petioles and mid-axis are densely covered with brown to reddish-brown scales, and the lower ones are larger. The name Ino-te comes from the impression of the petiole. The leaves are hard, herbaceous, yellow-green, and glossy. The pinnae are acute to blunt, with the tips of the sawtooth extending in an awn-like shape, and often curved into a sickle shape. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…山形県以南の暖地に普通のオシダ科の常緑性多年生シダ植物（イラスト）。根茎は太くて直立し，多数の葉を漏斗状に叢生（そうせい）する。葉は狭披針形から長楕円形，2回羽状複生，下部の羽片はやや逆行する。葉柄や中軸には褐色から赤褐色の鱗片が密生し，下部のものほど大型になる。猪の手の名は，この葉柄の印象に由来する。葉は硬い草質，黄緑色で光沢がある。小羽片は鋭頭から鈍頭，鋸歯の先端は芒（のぎ）状にのび，しばしば鎌形にまがる。…

※「Polystichum」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