Pollenating the Gourd Blossoms
To effect fertilization, nothing more is necessary than to pluck a staminate flower, pulling away its corolla, to expose the pollen-bearing surface, and to insert this in the pistillate flower, gently dusting the stigma with pollen. The facility with which this may be effected makes the members of this family very attractive to the amateur experimenter.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 3 Chapter 3