unisexual flower

... refers to a plant that has female and male flowers on separate individuals. The flowers of seed plants generally have stamens and pistils and are hermaphrodite flowers that have both sexes, whereas plants such as red pine, ginkgo, and pumpkin have unisexual flowers that have male and female flowers. Unisexual flowers are divided into monoecious plants (red pine, pumpkin, etc.) that have both types of flowers on the same plant, and dioecious plants (ginkgo, cycad, etc.) that have female and male flowers on separate individuals.

*Some of the terminology that mentions "unisexual flower" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…植物が雌花と雄花を別の個体にもつ場合をいう。種子植物の花は一般におしべとめしべをもち，両方の性を兼ねそなえた両性花hermaphrodite flowerであるのに対して，アカマツ，イチョウ，カボチャなどは単性花unisexual flowerであって雄花と雌花の区別をもつ。単性花は，同じ個体に両方のタイプの花をもつ雌雄同株(アカマツ，カボチャなど)と，雌花と雄花がそれぞれ別の個体についている雌雄異株(イチョウ，ソテツなど)とに区別される。…

※「unisexual flower」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