Epimedium

...A perennial herb of the Berberidaceae family that grows in the shade of trees in mountainous areas. The petals have long spurs at the base, and the flower's shape resembles an anchor, hence the name anchor grass. The underground stem is hard and has many roots. The plant is 30-50 cm tall. The flower stalk bears one leaf. Both the basal and stem leaves are usually bifoliate compound leaves. The leaflets have many stinging hairs on the edges. In April and May, it bears reddish purple or white flowers about 2 cm in diameter. The flowers are diploid, with a calyx consisting of six small outer sepals and four inner sepals, and four petals with a spur of about 15 mm. ...

*Some of the terminology explanations that mention "Epimedium" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…山地の木陰に生育するメギ科の多年草。花弁の基部に長い距があり，花の形が錨（いかり）に似ることから錨草の名がついた。地下茎は硬く，多数の根がある。草丈は30～50cm。花茎には1枚の葉をつける。根出葉と茎葉はともに，通常2回3出複葉をなす。小葉は縁に刺毛が多数つく。4～5月ころ，直径約2cmの紅紫色または白い花をつける。花は2数性で，萼は6枚の小さい外萼片と4枚の内萼片よりなり，花弁は4枚あり約15mmの距をつける。…

※「Epimedium」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