The manner of distribution of placentae on the ovary wall is called placentation the presentation includes the types and details about the placentation along with photos and labled diagrams.

3.  Marginal:
 Ovary is simple (monocarpellary)
 Unilocular,
 Placenta develop along the fused margins
of the carpels
 E.g., in Pea, Gram seeds and Cassia fistula
(amaltas) (PGC)

4.  Free Central:
 Compound ovary
 Unilocular
 Central axis arises from
the base of ovary
 E.g., Dianthus and
Primerose (DP)

5.  Parietal:
 Compound ovary
 Unilocular
 Fused margins swell up to
form placentae
 E.g., Melon, Cucumber,
Brassica (MCB)

6.  Basal:
 Compound ovary
 Unilocular
 Single large ovule arises
that is attached to the
base of ovary.
 E.g., sun bless mary.
Sunflower, Bassal, Marigold

7.  Superficial:
 Compound ovary
 multilocular
 Placenta develop all along the inner surface
of placenta wall
 E.g., Nympheae

8.  Axile:
 Polycarpellary and syncarpous gynoecium
 multilocular
 Placenta develop along the axile columns
of the carpels
 E.g., in tomato, lemon and china rose.
(TLC)