萼













曖昧さ回避
 「がく」と「へた」はこの項目へ転送されています。動物の口器の一部については「顎」を、山に関する「岳」については「岳」を、下手については「上手と下手」を、臆病な様子や人物を指す語については「へたれ」をご覧ください。





花弁 (petal) と萼片 (sepal)


萼（がく、蕚は異体字、英: calyx[1]）とは、植物用語の一つで、花冠（花弁、またはその集まり）の外側の部分をいう。ひらがな書きで「がく」とすることも多い[要出典]。萼の個々の部分を萼片（がくへん、英: sepal[1]）という。多くの場合、花弁（「花びら」のこと）の付け根（最外側）にある緑色の小さい葉のようなものが萼である。萼は花全体を支える役割を持つ。


また、果実に残り付いている萼は、蔕（へた）と呼ばれることがある。




目次






  • 1 花被


  • 2 まぎらわしい萼


  • 3 脚注


  • 4 関連項目





花被


萼と花冠が同じように見える場合は、ひとまとめにして花被（かひ; 英: perianth）ということが多い。花被を萼と花冠で区別する場合は、萼を外花被、花冠を内花被という。また、外花被、内花被のひとつひとつを、それぞれ外花被片、内花被片という。ただし、萼と花冠が一見して区別できる場合でも、ひとまとめにして花被ということもある。






  • ヤマユリ。一見すると6枚の花弁に見える。本当は手前に見える3枚が内花被片、奥の3枚が外花被片。






まぎらわしい萼


植物によっては、白や紫といった色が付いていたり、花弁のような形をしているものもある。また、萼のようであるが、正しくは苞のこともある。






  • オシロイバナ。白い花弁のような部分が萼、白い部分の付け根の萼ようなものが苞。本物の花弁は存在しない。







  • クレマチス。花弁のような部分が萼。本物の花弁は存在しない。







  • キクザキイチゲ。青紫色の花弁のような部分が萼。本物の花弁は存在しない。






脚注


[ヘルプ]



  1. ^ ab文部省、日本植物学会編 『学術用語集 植物学編』 丸善、1990年、増訂版。.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    ISBN 4-621-03376-X。




関連項目






ウィクショナリーに萼の項目があります。


  • 花冠

  • 苞




-

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