The left image is a staminate flower of Russian mulberry. The right image is a pistilate flower.
L. H. Bailey Standard Cyclopedia of Horticulture (New York, New York: The MacMillan Company, 1917)
2400×1169, 867.6 KiB
1024×498, 74.3 KiB
640×311, 39.1 KiB
320×155, 14.5 KiB