Evaluation location: California, United States
Head type data from Dr. Ed Ryder, Salinas, California. Dr. Ryder sent Pullman, WA what he called heirloom lettuce on 1/7/2000. Head type data came with the seed. Seed packets came to Pullman without accessions numbers. The name on the packet was matched with current plant name already in the NPGS whenever possible. Ed Ryder's definition of heirloom is it appeared on list in 1922 or before.