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  • Ambrosia artemisiifolia (category Ambrosia)
    Hybrids between Ambrosia artemisiifolia and A. psilostachya have been called A. ×intergradiens W. H. Wagner. The name Ambrosia ×helenae Rouleau applies
    4 KB (358 words) - 20:10, 5 November 2020
  • Ambrosia trifida (category Ambrosia)
    The name Ambrosia ×helenae Rouleau applies to hybrids between A. artemisiifolia and A. trifida. Hybrids between A. bidentata and A. trifida have been
    4 KB (354 words) - 20:09, 5 November 2020