Ragweeds (Ambrosia), also called bitterweeds and bloodweeds, are a genus of flowering plants from the sunflower family (Asteraceae).
Ambrosia artemisiifolia Ambrosia acanthicarpa Ambrosia trifida Ambrosia dumosa Pollen Allergy Asteraceae Leaf Protein Chenopodium botrys Ambrosia ambrosioides Conyza Melissopalynology Pappus (flower structure) Entomophily Anemophily Asterids Species Protein subunit Calcium-binding protein Profilin Roundup Glyphosate American Journal of Botany Subshrub Ambrosia Asteroideae Goldenrod Allergen North America Taproot Biological pest control Hay fever Asteridae Carl Linnaeus Scythe Generic name Heliantheae Atomic mass unit Honey bee