Centranthera cochinchinensis (Lour.) Merr.ssp.lutea (Hara) Yamazaki

Japanese: ゴマクサ(胡麻草) - ゴマクサ（英語表記）Centranthera cochinchinensis (Lour.) Merr.ssp.lutea (Hara) Yamazaki

An annual plant of the Scrophulariaceae family that grows in low-lying marshes in warm regions (illustration). The Japanese name comes from the fact that the entire plant is covered in hairs and the shape of the flowers and the fruit that produces many seeds resembles sesame. The stem is upright, almost unbranched, 10-60 cm tall, and covered with stiff white hairs. The leaves are thick and opposite, narrowly lanceolate or broadly needle-shaped. In summer, the plant produces yellow, tubular flowers with rounded tips that are divided into five lobes. The corolla is 2 cm long, and the lobes are divided into two upper lobes and three lower lobes that are somewhat lip-shaped. The calyx is tubular with a pointed tip and deeply lobed on the ventral side.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

暖地の低層湿原に生えるゴマノハグサ科の一年草（イラスト）。和名は全体が毛でおおわれ，花と多数の種子をだす果実の形がゴマを思わせることによる。茎は直立し，ほとんど分枝せず，高さ10～60cm，全体に堅い白毛がある。葉は厚く対生し，狭披針形または広針形。夏，筒形で先が円い5片に分かれる黄色の花を開く。花冠は長さ2cm，裂片は上側2片と下側3片とに分かれ，やや唇形である。萼は先のとがる筒形で，腹面が深く裂ける。

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

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