True fruit (English spelling) truefruit

Japanese: true fruit(英語表記)truefruit
True fruit (English spelling) truefruit

...Some species, such as the Tessen and the Acanthus gracilis, have retained their style and grown together with the ovary, making them useful for dispersal. In this way, a fruit whose structure involves parts other than the ovary is called a false fruit, and a fruit consisting only of the ovary is sometimes called a true fruit. However, the distinction between the two is not always clear. For example, in the case of persimmons, the calyx grows significantly, making it a false fruit, while in mandarin oranges, the calyx hardly grows at all, so calling it a true fruit is too artificial.

*Some of the terminology that mentions "true fruit" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…花柱が残って子房とともに大きくなり散布に役立つものが,テッセン,チングルマなどに知られている。 このように実の構成に子房以外の部分が関係しているものを偽果false fruitと呼び,子房からのみなる狭義の実を真果true fruitとして区別することがある。しかし両者の区別は必ずしも明瞭ではなく,例えばカキでは萼が著しく生長するので偽果となり,ミカンの萼はほとんど生長しないため真果とするのでは,あまりにも人為的過ぎる。…

※「true fruit」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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