| Code | Definition | Number of Accessions |
| Lettuce-Butterhead | This accession is a member of the Lettuce-Butterhead type subset | 371 |
| Lettuce-Cabbage Lettuce | This accession is a member of the Lettuce-Cabbage Lettuce type subset | 4 |
| Lettuce-Chinese stem | This accession is a member of the Lettuce-Chinese stem type subset | 7 |
| Lettuce-Cos | This accession is a member of the Lettuce-Cos type subset | 74 |
| Lettuce-Crisphead | This accession is a member of the Lettuce-Crisphead type subset | 158 |
| Lettuce-Glasshouse | This accession is a member of the Lettuce-Glasshouse type subset | 126 |
| Lettuce-Latin | This accession is a member of the Lettuce-Latin type subset | 7 |
| Lettuce-Leaf | This accession is a member of the Lettuce-Leaf type subset | 21 |
| Lettuce-Stem | This accession is a member of the Lettuce-Stem type subset | 15 |