A small shrub of the Verbenaceae family, native to tropical America and Africa. It is originally the name of a genus, and a general term for about 150 species, but one of them, L. camara , is usually called simply lantana. In Japan, it is often grown in pots in greenhouses. In warm areas such as the Ryukyu Islands and the Ogasawara Islands, it is grown outdoors as a hedge, and often escapes and becomes naturalized. The stems are square and hairy, and small thorns grow sparsely. The leaves are opposite, oval, about 6 cm long, pointed at the tip, and have serrated edges. From summer to autumn, long flower stalks emerge from the leaf axils, and many small flowers grow densely at the tip in a scattered shape. The corolla is initially yellow or pale pink, and later changes to orange or deep red. Therefore, the center of each inflorescence is pale and the periphery is dark. The Japanese name, Kououka (red and yellow flower) and Shichihenge (seven changes), are based on the change in flower color. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
クマツヅラ科の小低木で,熱帯アメリカとアフリカの原産。本来は属の名で,約 150種の総称であるが,普通はそのうちの1種 L. camaraを単にランタナと呼ぶ。日本では鉢植にして温室に栽培されることが多い。南西諸島や小笠原諸島などの暖地では戸外で生垣などに栽培し,またしばしば逸出して野生化している。茎は四角であらい毛があり,また小さいとげがまばらに生えている。葉は対生し長さ 6cm内外の卵形で先はとがり,縁に鋸歯がある。夏から秋にかけて,葉腋から長い花茎を出し,先に多数の小花が散形状に密生する。花冠は初め黄色または淡紅色で,のちに橙色または濃赤色に変る。このためおのおのの花序のなかで中心部が淡色で外周部が濃色になる。和名としてコウオウカ (紅黄花) とも,またシチヘンゲ (七変化) とも呼ばれるのはこの花色の変化に基づく。
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