Five Placentation Types

Key: How to Identify Placentation in NEET

1. How many locules (chambers) does the ovary have?
   • 1 locule → can be: Marginal, Parietal, Free Central, or Basal
   • Multiple locules → Axile
2. If 1 locule, where are the ovules?
   • Along ventral wall (margin) → Marginal
   • On inner wall (with false septum) → Parietal
   • On central column (with septa) → Axile (wait, actually has septa here)
   • On free column (no septa) → Free Central
   • Only 1 ovule at bottom → Basal
3. How many carpels?
   • 1 carpel → Marginal (Fabaceae)
   • Multiple free → check other features