The ovary is half inferior in:

In perigynous flowers, the gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level. The ovary here is said to be half inferior, e.g., Plum, rose, peach.Brinjal and Mustard have superior ovaries (hypogynous).Sunflower (ray florets) has an inferior ovary (epigynous).