 Ambrosia acanthicarpa USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 342. |
 Ambrosia artemisiifolia Hippolyte Coste - Flore descriptive et illustrée de la France, de la Corse et des contrées limitrophes, 1901-1906 - This image is in public domain because its copyright has expired. |
 Ambrosia artemisiifolia Credit: Photo by Enrico Romani |
 Ambrosia artemisiifolia var. elatior USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 341. |
 Ambrosia bidentata USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 341. |
 Ambrosia maritima Hippolyte Coste - Flore descriptive et illustrée de la France, de la Corse et des contrées limitrophes, 1901-1906 - This image is in public domain because its copyright has expired. |
 Ambrosia maritima Credit: Photo by Franco Rossi |
 Ambrosia maritima Credit: Photo by Franco Rossi |
 Ambrosia maritima Credit: Photo by Marinella Zepigi |
 Ambrosia maritima Credit: Photo by Marinella Zepigi |
 Ambrosia maritima Credit: Photo by Marinella Zepigi |
 Ambrosia maritima Credit: Photo by Marinella Zepigi |
 Ambrosia maritima Credit: Photo by Marinella Zepigi |
 Ambrosia psilostachya USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 342. |
 Ambrosia psilostachya Credit: Photo by Brunello Pierini |
 Ambrosia tomentosa USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 343. |
 Ambrosia tomentosa USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 343. |
 Ambrosia trifida Robert H. Mohlenbrock USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln. - Not copyrighted image |
 Ambrosia trifida USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 341. |
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