Siphonostegia

…A semi-parasitic annual plant of the Scrophulariaceae family that grows in low mountain grasslands (illustration). The stems, which grow upright from weak roots, are 30-70 cm tall. The leaves are opposite on the lower part and alternate on the upper part, ovate, deeply lobed into broad linear lobes, 1.5-5 cm long and 1-3 cm wide, and covered with short hairs. In August and September, flowers with a bright yellow color and a conspicuous lip-shaped corolla with a reddish-brown underside on the upper lip appear next to the upper leaves. The flowers are tubular, enclosed in a calyx with 10 longitudinal stripes, 2.8 cm long, and have a flattened tubular upper lip with a pointed tip. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…低山地の草原に生えるゴマノハグサ科の半寄生の一年草（イラスト）。貧弱な根から直立する茎は，高さ30～70cm。葉は下部で対生，上部で互生し，卵形で，広線形の裂片に深く裂け，長さ1.5～5cm，幅1～3cm，全体に短い毛がある。8～9月，上部の葉のわきに，鮮黄色で上唇下側が赤褐色の目だつ唇形花冠をもつ花をつける。花は筒状で，10本の縦条のある萼に包まれ，長さ2.8cm，上唇は左右に扁平な筒状で，先がとがる。…

※「Siphonostegia」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