Leaflet shape
Measured on the terminal leaflet of third trifoliate leaf according to the ratio of length (l) to width (w). See Figure 2.

| Code | Term | Description |
|---|---|---|
| 1 | Round | 1/W = 1.5 |
| 3 | Ovate | 1/W = 1.5-2 |
| 5 | Ovate-lanceolate | 1/W = 2.3 |
| 7 | Lanceolate | 1/W = 3-6 |
| 9 | 1Linear-lanceolate | 1/W = 6 |