| Code | Definition | Number of Accessions |
| 1 | double bract nect - nectary glands at the base of the bracts occurred in pairs | 3 |
| 2 | long middle nectary = nectary bract on leaf midrib is highly elongated | 220 |
| 3 | red spot leaf nectary = nectary on leaf midrib also contains red coloration | 9 |
| 4 | red spot bract nectary = nectary at the base of the bract also contains red coloration | 3 |
| 5 | red spot boll nectary = nectary at the base of the boll also contains red coloration | 3 |