Two Gourd Blossoms to be Pollenated
The Gourd belongs to the same family as the pumpkin, and, like that plant, bears the staminate and pistillate flowers seperately. This arrangement makes it very easy to effect hybridization. Gourds and other squashes are cross-fertilized so readily that different species must be grown far apart if the strains are to be kept pure.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 3 Chapter 3