| ▲Index▼ | ▲Name▼ | ▲Number of descriptors▼ | ▲Number of pictures▼ |
| 1. | informative descriptor | 25 | 0 |
| 2. | cortex | 3 | 0 |
| 3. | central cylinder | 28 | 0 |
| 4. | fibrous vascular bundle | 19 | 0 |
| 5. | ground parenchyma | 4 | 0 |
| 6. | numerical | 1 | 0 |
| 7. | present in fossil descriptions but not informative | 6 | 0 |