Cross Section of Ovary of Flower of Gooseberry and Potato
A shows the cross section of the ovary of the gooseberry flower is formed by two carpels joined near their edges. B shows the cross section of the ovary of potato formed by two carpels meeting in the middle.
Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)