| Code | Definition | Number of Accessions |
| 1 | Much longer than wide, with the widest point below the middle | 124 |
| 10 | Broadest at the middle and narrower at the two equal ends | 447 |
| 11 | | 3 |
| 2 | Broadest at the middle and narrower at the two equal ends, but with the lngth being over twice the width | 230 |
| 3 | Broadest at the middle and narrower at the two equal ends, but with the width over one-half the length | 135 |
| 4 | Egg-shaped in outline and attached at the broad end | 799 |
| 5 | Inversely ovate, with attachment at the narrower end | 16 |
| 6 | Heart-shaped | 5 |
| 7 | | 1 |
| 8 | Shape nearing that of an equilateral triangle | 11 |
| 9 | Inversely lanceolate, with attachment at the narrower end | 11 |