Petiole color
| Code | Term | Description |
|---|---|---|
| 1 | All green with purple base | |
| 2 | All green with purple leaf junction | |
| 3 | All green with purple at both ends | |
| 4 | All purplish green with purple base | |
| 5 | All purplish green with purple leaf junction | |
| 6 | All purplish green with purple at both ends | |
| 7 | Green | |
| 8 | Purple | |
| 9 | Brownish green | |
| 10 | Brown | |
| 11 | Dark brown | |
| 99 | Other (specify) |