A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum
Hosted by the University of Washington Herbarium, Burke Museum
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Asteraceae » Ambrosia psilostachya
Ambrosia psilostachya DC.[FNA21, HC, HC2]
perennial ragweed, western ragweed
Publication: Prodr. 5: 526. 1836.
Origin: Native
Herbarium search: CPNWH
Notes: FNA21: "Hybrids between Ambrosia psilostachya and A. artemisiifolia have been called A. ×intergradiens W. H. Wagner."
Last updated 5/26/2020 by David Giblin.
Synonyms & Misapplied Names:
Ambrosia psilostachya DC. var. californica (Rydb.) S.F. Blake
Ambrosia psilostachya DC. var. coronopifolia (Torr. & A. Gray) Farw.
Ambrosia psilostachya DC. var. lindheimeriana (Scheele) Blank.
Ambrosia rugelii Rydb.
