What type of placentation is seen in sweet pea ?

Placentation is the arrangement of ovules within the ovary.
Sweet pea (Lathyrus odoratus) belongs to the family Fabaceae (Leguminosae).
Its gynoecium is monocarpellary with a superior, unilocular ovary.
The placenta forms a ridge along the ventral suture of the ovary, and the ovules are borne on this ridge in two rows. This is marginal placentation.
Basal placentation is seen in sunflower and marigold.
Axile placentation is seen in china rose, tomato and lemon.
Free central placentation is seen in Dianthus and Primrose.
So the placentation in sweet pea is marginal.