Ambroisie – Ambrosia artemisiifolia

 




Les pollens de l'ambroisie énormément allergènes déclenchent de forts picotements dans le nez, des yeux qui pleurent et de l'asthme. Les pollens de cette plante, originaire d'Amérique du Nord, peuvent s'introduire profondément dans les poumons et provoquer des inflammations. De même, la fleur au contact avec la peau peut provoquer des allergies. Cette plante fleurit d'août à octobre. Selon la nouvelle loi, les endroits où elle apparait doivent être annoncés et la plante immédiatement arrachée avec la racine. Pour ce faire, il faut utiliser des gants et en période de floraison porter un masque de protection. L'ambroisie doit être éliminée par incinération, donnée avec les déchets verts où mise au compost elle continuerait à se propager par les graines. L'ambroisie atteint 20 à 150 cm de hauteur, dont la tige, en général rougeâtre et
poilue, est fortement ramifiée. Les feuilles profondément découpées sont vertes sur les deux faces avec une nervure blanchâtre. Les feuilles des jeunes plantes poussent symétriquement opposées. Les fleurs mâles au bout des tiges sont petites et ressemblent à des tubercules. Les graines peuvent survivre dans le sol pendant une quarantaine d'années.


Armoise – Artemisa vulgaris

Aulne – Alnus glutinosa

Berce– Heracleum mantegazzianum

Bouleau – Betula pendula

 

Euphorbe – Euphorbia lathyris

 

Fritillaire impériale – Frittilaria imperialis

 

Noisetier – Corylus avellana

 

Primevère – Primula obonica

 

Rue – Ruta graveolens

 

Saule (osier) – Salix

 

Tulipes – Tulipa gesneriana



13-11-2008 | 1547 vues

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