A perennial plant of the lily family that grows naturally in mountain forests in warm regions of Japan, but is also potted for decorative purposes, and many varieties are known. The rhizome is thick and short, and the leaves grow in clusters at the end of the stem. It is 30-50 cm long, lanceolate, pointed at the end, and dark green and glossy. In spring, a thick flower stalk about 10 cm long emerges from between the leaves, and pale yellow flowers grow densely in spikes. The inflorescence is oblong or oval, about 2-3.5 cm long. In autumn, the spherical berries ripen and turn red. The rhizome contains a type of glycoside, from which a cardiac stimulant and diuretic is made. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
ユリ科の多年草で,日本の暖地の山林に自生するが,また観賞用として鉢植にされ,品種が多数知られている。根茎は太く短く,葉は茎の先に集ってつく。長さ 30~50cm,披針形で先はとがり,暗緑色でつやがある。春,葉の間から 10cm内外の太い花茎を出し,淡黄色の花を穂状に密につける。花穂は長楕円形または卵形で,長さ2~3.5cmぐらい。秋に球形の液果が赤く熟する。根茎は一種の配糖体を含み,強心・利尿剤がつくられている。
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