Lychnis

...A perennial plant of the Caryophyllaceae family native to China that has long been cultivated in Japan for ornamental purposes. The Japanese name is said to come from the fact that it was once cultivated at Sen'oji Temple in Kyoto. The stem is upright and about 50 cm tall. The leaves are about 7 cm long, ovate to oblong, pointed at both ends, and hairy on both sides and the edges. From July to September, a cyme blooms at the end of the stem. The sepals are fused to form a calyx tube that is club-shaped, about 3 cm long, and has 10 veins. The flowers are about 4 cm in diameter, deep red, and irregularly lobed at the end into 4 to 6 parts. There is also a white-flowered variety called shirobanasennou. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…中国原産で，日本でも古くから観賞用に栽培されるナデシコ科の多年草。和名は昔，京都の仙翁寺で栽培されていたことによるという。茎は直立し，高さ約50cm。葉は長さ7cmほどで，卵形から長楕円形，両端はとがり，両面とふちには毛がある。7～9月，茎の先に集散花序をつける。萼片は合着して萼筒となり，棍棒状で長さ約3cm，10脈がある。花は直径4cmほどで濃紅色，先は4から6に不規則に裂ける。シロバナセンノウと呼ばれる白花品もある。…

※「Lychnis」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