Burbank Onions Grown for Seed
Mr. Burbank has worked extensively with the onion, as with numerous other members of the tribe of alliums. Here we see a field of perfected Burbank onions that have been allowed to go to seed. The excellent character of the bulbs may be inferred from the size and vigorous development of the tops.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 7 Chapter 5