| Kind | Value | annotation | ||
| enumeration | 1_at tip | |||
| enumeration | 2_distal quarter | |||
| enumeration | 3_distal half | |||
| enumeration | 4_distal three quarters | |||
| enumeration | 5_basal three quarters | |||
| enumeration | 6_basal half | |||
| enumeration | 7_basal quarter | |||
| enumeration | 8_at base | |||
| enumeration | 9_on margin | |||
| enumeration | 10_marginal zone | |||
| enumeration | 11_central bar | |||
| enumeration | 12_transverse zone [band] | |||
| enumeration | 13_throughout |