Pelargonium Blossom and Nectary
Pictured are the stigmas, calyx, and nectary on flower A of the pelargonium blossom. Flower B pictures the calyx with ovary in cross section, nectary, and ovary. Flower C pictures the blossom with corolla removed. D and E are cross section of the ovary. F is the stamen.
Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)