All Species in Ambrosia
- Ambrosia Leaf Bur Ragweed (Ambrosia ambrosioides)
- Annual Ragweed (Ambrosia artemisiifolia)
- Burrobrush (Ambrosia salsola)
- Burrobush (Ambrosia dumosa)
- Coastal Ragweed (Ambrosia hispida)
- Cuman Ragweed (Ambrosia psilostachya)
- Dwarf Bur Ragweed (Ambrosia pumila)
- Flatspine Bur Ragweed (Ambrosia acanthicarpa)
- Hairy Ragweed (Ambrosia canescens)
- Hollyleaf Bur Ragweed (Ambrosia ilicifolia)
- Lanceleaf Ragweed (Ambrosia bidentata)
- Ragweed (Ambrosia × helenae)
- Ragweed (Ambrosia ×intergradiens)
- Rio Grande Ragweed (Ambrosia cheiranthifolia)
- San Diego Bur Ragweed (Ambrosia chenopodiifolia)
- Sanderson's Burrobrush (Ambrosia sandersonii)
- Silver Bur Ragweed (Ambrosia chamissonis)
- Singlewhorl Burrobrush (Ambrosia monogyra)
- Skeletonleaf Bur Ragweed (Ambrosia tomentosa)
- Streaked Bur Ragweed (Ambrosia linearis)
- Texan Great Ragweed (Ambrosia trifida)
- Triangle Bur Ragweed (Ambrosia deltoidea)
- Tucson Bur Ragweed (Ambrosia cordifolia)
- Weakleaf Bur Ragweed (Ambrosia confertiflora)
- Woolly Fruit Bur Ragweed (Ambrosia eriocentra)
- Woollyleaf Bur Ragweed (Ambrosia grayi)