ambrosia artemisiifolia causing allergy also been called annual ragweed, bitterweed, blackweed, carrot weed, hay fever weed.

allergenic allergic allergy also ambrosia american annual artemisia artemisiifolia been bitterweed blackweed called carrot causing color disease fever flowers green growth head ilness leaf plants pollen ragweed reaction sickness stammerwort stem stickweed summer tassel weed wormwood