An annual plant of the Asteraceae family. The stems are well-branched, ranging from creeping to erect. The leaves are opposite each other and rough with short bristles along with the stems. From July to September, white flower heads grow on flower stalks several centimeters long in the leaf axils at the ends of the branches. The flower heads consist of ray and tubular flowers, both of which bear fruit. The ray corollas are thin, and the tubular corollas have four lobes at the end. They grow in rice paddies and wetlands from Okinawa to Honshu, as well as in urban ditches, and are widely distributed in the tropics and subtropics. [Hiroyuki Koyama] The leaves grow opposite each other and have short bristles along with the stems. From July to September, white flower heads appear in the leaf axils at the ends of the branches. The flower heads consist of ray florets and tubular flowers. ©Shogakukan Photo by Masatoshi Hirose "> Takasaburo Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
キク科の一年草。茎はよく分枝し、地をはうものから直立するものまである。葉は対生し、茎とともに短い剛毛があってざらつく。7~9月、枝先の葉腋(ようえき)に数センチメートルの花柄を伸ばし白色の頭花をつける。頭花は舌状花と管状花からなり、ともに結実する。舌状花冠は細く、管状花冠は先が4裂する。沖縄から本州の水田や湿地、都会の溝などに生え、熱帯、亜熱帯に広く分布する。 [小山博滋] 葉は対生し、茎とともに短い剛毛をもつ。7~9月、枝先の葉腋に白色の頭花をつける。頭花は舌状花と管状花からなる©Shogakukan 撮影/広瀬雅敏"> タカサブロウ 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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