A deciduous shrub of the Oleaceae family. It is also called Itachihaze. Native to China, it is planted in gardens for decorative purposes. It grows to a height of about 3m, with pale yellowish brown bark and vine-like drooping upper branches. Young branches have ridges and a hollow pith. The leaves are opposite, elliptical and sawtoothed. They often have leaves that branch into a trifoliate compound leaf shape. In early spring, many yellow tubular flowers bloom before the leaves appear. It is famous as a flower that heralds the arrival of spring. The tip of the corolla is deeply lobed into four parts and opens in a cross shape. Similar species include Korean Forsythia koreana and Chinese Forsythia viridissima , while Yamato Forsythia japonica rarely grows wild on limestone land in the Chugoku region of Japan. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
モクセイ科の落葉低木。イタチハゼともいう。中国原産で,観賞用として庭園に植えられる。高さ約 3mで樹皮は淡黄褐色,上部の枝はつる状に垂れる。若枝には稜があり,髄は中空となる。葉は対生し,楕円形で鋸歯がある。しばしば3出複葉状に分岐した葉をつけることもある。早春,葉に先立って黄色の筒状の花を多数つける。春を告げる花として有名である。花冠の先は4深裂して十字状に開く。近似種にはチョウセンレンギョウ F. koreana,シナレンギョウ F. viridissimaがあり,ヤマトレンギョウ F. japonicaは日本の中国地方の石灰岩地にまれに自生する。
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