Presence in % of total | Classes | Number of species | Features |
0 - 20 | I | 11 | Accidental |
21 - 40 | II | 8 | Accessory |
41 - 60 | III | 4 | Quite Frequent |
61 - 80 | IV | 5 | Frequent |
81 - 100 | V | 2 | Very Frequented |