Placentation

…The location of the placenta in the ovary varies depending on the way the carpels are attached and the number of ovules, and is thought to have undergone various changes during the process of phylogenetic development. The way the placenta is attached is called placentation, and is important when considering the phylogeny of angiosperms, and has been extensively studied morphologically. In isolated pistils, the ovary is one-locular, and the ovules are usually attached to the edge of the carpel. …

*Some explanations of terms that mention "placentation" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…子房における胎座の位置は心皮の合着のしかたや胚珠の数により異なり，また系統発生の過程でさまざまな変化をしたと考えられる。　胎座のつき方を胎座型placentationとよび，被子植物の系統を考えるうえで重視され，形態学的にもよく研究されている。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。…

※「placentation」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