A perennial plant of the Araceae family (APG classification: Araceae). It has a corm and reproduces by producing many bulblets. It has one leaf, a short pseudostem, and a leaf blade with many leaflets in a goosefoot shape. It flowers from April to May. The spathe is purple-brown and the tube is white. The inflorescence appendages are smooth overall, with elongated thread-like tips that reach a length of 30 cm. It is distributed from Hokkaido to parts of Honshu, Shikoku, and Kyushu, and grows under and on the edges of forests. The subspecies Nangokuurashimasou subsp. thunbergii is distributed in Honshu, Shikoku, Kyushu, and surrounding areas west of the Kii Peninsula, and is distinguished by the fact that the lower thick part of the appendage is usually milky white, it has dense pleated thin projections, and the leaves often have white spots. In southern Kyushu and Yamaguchi Prefecture, there is A. kiushianum Makino, which is small overall and has a clove-shaped white spot on the inside of the spathe. The Japanese name Urashima comes from the likening of the thread-like appendages to Urashima Taro's fishing line. [Hitoshi Murata January 21, 2022] [Reference] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
サトイモ科(APG分類:サトイモ科)の多年草。球茎があり、多数の子球をつけて繁殖する。葉は1枚、偽茎は短く、葉身は多数の小葉を鳥足状につける。花期は4~5月。仏炎包(ぶつえんほう)は紫褐色で筒部は白色を帯びる。花序付属体は全体に平滑で、先が細長く伸びて糸状となり長さ30センチメートルに達する。北海道から本州、四国、九州の一部に分布し、林下や林縁に生える。亜種のナンゴクウラシマソウsubsp. thunbergiiは紀伊半島以西の本州、四国、九州とその周辺地域に分布し、付属体の下部の太い部分が通常乳白色で、ひだ状の細突起を密生し、葉にしばしば白色の斑(ふ)があることで区別される。また、九州南部および山口県には、全体に小形で、仏炎包内面に丁字(ていじ)形の白斑(はくはん)があるヒメウラシマソウA. kiushianum Makinoがある。和名のウラシマは、糸状の付属体を浦島太郎の釣り糸に例えたものである。 [邑田 仁 2022年1月21日] [参照項目] |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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