Rehmannia glutinosa (English spelling)

Japanese: ジオウ(地黄) - ジオウ（英語表記）Rehmannia glutinosa

A perennial plant of the Scrophulariaceae family. Native to northeastern China, it is cultivated for its rhizomes, which are used as a medicinal tonic. The rhizomes are reddish brown and swollen, often crawling underground. The stems are erect and grow to a height of 15-30 cm, covered with dense soft hairs, and have many basal leaves at the base of the plant. The stem leaves are alternate. The leaf blade is oblong, 7-18 cm long, 2-6 cm wide, and has coarse sawtooth edges. In early summer, a single large flower blooms in the leaf axil. The corolla is pale pink-purple, tubular, about 3 cm long, and lip-shaped at the end. Inside the flower tube are four stamens with long filaments and one pistil with a long style.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ゴマノハグサ科の多年草。中国東北部の原産で，地下茎を強壮剤として薬用にするために栽培される。地下茎は赤褐色で肥大して太くなり，しばしば地中をはう。茎は直立して高さ 15～30cmになり，全体に軟毛を密生し，根ぎわに根生葉を多数つける。茎葉は互生する。葉身は長楕円形で長さ7～18cm，幅2～6cm，縁にあらい鋸歯をもつ。初夏，葉腋に大きな花を1個開く。花冠は淡紅紫色，筒状で長さ約 3cm，先が唇形になる。花筒内には，長い花糸をもった4本のおしべと1本の長い花柱をもっためしべがある。

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