Fragrant Sweet Peas
Mr. Burbank has a very keen sense of smell, and he is always on the lookout for flowers that show exceptional qualities of fragrance. Many sweet peas are quite odorless, but here are some in which Mr. Burbank has developed an exquisite fragrance. Careful observation and persistent selective breeding have been the watchwords here as with so many other experiments.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 9 Chapter 1