A large annual plant of the Amaranthaceae family (APG classification: Amaranthaceae). The stem is 1-2 meters tall, thick, pubescent, and branched. The leaves are diamond-shaped, ovate, and long-stalked. Flowering season is August-September. The female flower's tepals are spatulate, 2-3 mm long, altogether white, with a rounded or slightly concave tip, and longer than the caryopsis. A naturalized plant native to tropical America, it grows from Hokkaido to Okinawa. Another naturalized plant native to tropical America, A. hybridus L. ( A. patulus Bertol.), has lanceolate tepals that are 1.5-2 mm long and shorter than the caryopsis. Recently, it has become more commonly seen than Amaranth. [Junko Kobayashi January 21, 2021] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ヒユ科(APG分類:ヒユ科)の大形の一年草。茎は高さ1~2メートル、肥厚し、軟毛があり、分枝する。葉は菱形(ひしがた)状卵形で長柄がある。花期は8~9月。雌花の花被片(かひへん)はへら形で長さ2~3ミリメートル、白膜質で先は円いか、ややへこみ、胞果より長い。熱帯アメリカ原産の帰化植物で、北海道から沖縄に生育する。同じ熱帯アメリカ原産で帰化植物のホソアオゲイトウA. hybridus L.(A. patulus Bertol.)は花被片は披針(ひしん)形で長さ1.5~2ミリメートル、胞果より短い。最近ではアオゲイトウより普通にみられる。 [小林純子 2021年1月21日] 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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