Torenia

...A herbaceous plant of the Scrophulariaceae family, it is usually cultivated in flower beds and pots. Its Japanese name is Hanaurikusa. Its height is 20-25cm. The plant is well-branched and upright, with square stems and pointed, ovate leaves that grow opposite each other. In autumn, it produces purple-blue or milky white flowers in the axils at the top of the stem, which are beautiful when they bloom all over the place. The flower consists of two pale blue petals that are indistinctly fused together to form the upper lip, and three dark purple-blue petals that are clearly fused together to form the lower lip, with yellow spots at the throat of the flower. The pistils close when touched. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ゴマノハグサ科の草本植物で，ふつう花壇や鉢植えに栽培される。和名をハナウリクサという。草丈20～25cm。株はよく分枝して直立し，茎は四角，葉は尖卵形で対生する。秋には茎の上部の葉腋（ようえき）に紫青色または乳白色の花をつけ，一面に咲くと美しい。花は不明りょうに合着した淡青色の2枚の花弁が上唇弁となり，下唇弁は濃紫青色の3枚が明りょうに合着して成り立ち，花喉部に黄色の斑紋がある。めしべは接触すると閉じる。…

※「Torenia」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