Attention au pollen allergisant [1]. On la rencontre peu dans le Nord de l’Europe et plutôt sur les murs, en climat doux maritime, où la plante profite de la chaleur accumulée.
Pour l’ensemble des urticacées
sem.\ann. | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Codes : 1 (< 1 %), 2 (1-5 %), 3 (5-10 %), 4 (10-25 %), 5 > (> 25 %) | |||||||||||||
7 | nc | nc | nc | nc | nc | nc | nc | nc | nc | nc | nc | nc | _ |
8 | nc | nc | nc | _ | _ | nc | nc | nc | _ | _ | nc | nc | _ |
9 | nc | nc | _ | _ | _ | _ | _ | _ | _ | _ | _ | 1 | _ |
10 | nc | nc | _ | _ | _ | _ | _ | _ | _ | _ | 1 | 1 | _ |
11 | nc | nc | _ | _ | _ | _ | _ | _ | _ | _ | 1 | _ | _ |
12 | nc | nc | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | 1 |
13 | nc | nc | _ | _ | _ | _ | _ | 1 | _ | _ | _ | 1 | 1 |
14 | 1 | nc | _ | _ | _ | _ | _ | _ | _ | _ | 1 | _ | 1 |
15 | 1 | nc | _ | _ | _ | _ | 1 | _ | 1 | _ | 1 | 1 | _ |
16 | 1 | 1 | _ | _ | _ | _ | _ | 1 | 1 | _ | 1 | 1 | 1 |
17 | 1 | 1 | _ | 1 | _ | _ | _ | 1 | _ | _ | _ | 1 | 1 |
18 | 1 | 1 | 1 | 1 | _ | _ | _ | 1 | 1 | _ | 1 | 1 | 1 |
19 | 1 | 1 | _ | 1 | nc | _ | _ | 1 | 1 | 1 | 1 | 1 | 1 |
20 | 1 | 1 | 1 | 1 | 1 | _ | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
21 | 1 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 2 | 1 | 1 |
22 | 1 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 3 | 1 | 2 | 2 | 2 |
23 | 2 | 3 | 4 | 2 | 3 | 2 | 3 | 2 | 2 | 2 | 3 | 4 | 2 |
24 | 2 | 4 | nc | 3 | 2 | 3 | 2 | 2 | 2 | 3 | 3 | 4 | 2 |
25 | 3 | 3 | 2 | 2 | 3 | 2 | 3 | 2 | 2 | 4 | 2 | 3 | 2 |
26 | 2 | 2 | 4 | 2 | 3 | 4 | 3 | 3 | 3 | 3 | 2 | 4 | 2 |
27 | 2 | 2 | 3 | 2 | 3 | 3 | 2 | 2 | 3 | 3 | 2 | 3 | 3 |
28 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 |
29 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 2 | 4 |
30 | 3 | 2 | 2 | 3 | 4 | 2 | 3 | 2 | 2 | 1 | 3 | 2 | 3 |
31 | 4 | 2 | 2 | 4 | 3 | 2 | 4 | 4 | 3 | 2 | 3 | 2 | 3 |
32 | 3 | 3 | 2 | 4 | 3 | 4 | 4 | 4 | 4 | 2 | 3 | 3 | 3 |
33 | 3 | 5 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 3 | 3 | 3 | 4 |
34 | 3 | 3 | 2 | 3 | 3 | 4 | 3 | 3 | 3 | 4 | 2 | 3 | 4 |
35 | 3 | 2 | 3 | 2 | 3 | 2 | 4 | 2 | 2 | 3 | 4 | 3 | 2 |
36 | 4 | _ | 2 | 2 | 2 | 2 | 2 | nc | 2 | 3 | 3 | 2 | _ |
37 | 2 | _ | 2 | 2 | 2 | 1 | 1 | nc | 1 | 1 | 2 | 2 | 1 |
38 | 2 | 2 | 2 | 1 | 1 | nc | nc | nc | nc | nc | nc | nc | nc |
39 | 1 | _ | nc | nc | 1 | nc | nc | nc | nc | nc | nc | nc | nc |