Ensei placenta type

...In the case of the free pistils, the ovary is one-locular, and the ovules are usually attached to the edge of the carpel. This type is called the marginal placenta type (a in Fig. 2) and is a primitive type. Although they have free pistils, Akebia and Water Lily have ovules attached to the side walls of the ovary locus, which is called the surface placenta type (d in Fig. ...

*Some of the terminology explanations that refer to the "environmental placenta type" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…離生めしべでは子房は1室で，普通，胚珠は心皮の縁辺につく。このようなものを縁生胎座型(図2のa)とよび，原始的な型である。離生めしべをもつが，アケビ，スイレンでは子房室の側壁に胚珠がつき，面生胎座型(図のd)という。…

※「縁生胎座型」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