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Asteraceae
Ambrosia

not marked as a favorite taxon Ambrosia trifida Linnaeus var. trifida. Common name: Giant Ragweed. Phenology: Jul-Nov. Habitat: Floodplains, moist pastures, disturbed ground. Distribution: NS and BC south to n. peninsular FL, Panhandle FL, TX, and CA. Report from s. FL (Kartesz 2022) is false, based on misidentified specimen.

Glossary (beta!)

Origin/Endemic status: Native

Taxonomy Comments: The distinction between var. trifida and var. texana (or at the specific rank A. trifida and A. aptera) warrants additional study.

Synonymy ⓘ: = C, F, G, GrPl, Il, NE; = Ambrosia trifida L. — S; < Ambrosia trifida L. — Fl7, FNA21, K4, Mi, Mo2, NY, Oh3, Ok, Pa, RAB, SE1, Tat, Tn, Va, WH3, McMillan & Prevost (2022); Ambrosia trifida L. Basionym: Ambrosia trifida L. 1753

Links to other floras: < Ambrosia trifida - FNA21

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
  • Great Plains: FAC (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 6

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image #1 of Ambrosia trifida var. trifida© Bruce Sorrie | Original Image ⭷
image #2 of Ambrosia trifida var. trifida© Bruce Sorrie | Original Image ⭷
image #3 of Ambrosia trifida var. trifida© Bruce Sorrie | Original Image ⭷
image #4 of Ambrosia trifida var. trifida© Sonnia Hill | Original Image ⭷
image #5 of Ambrosia trifida var. trifida© Alan Weakley source
image #6 of Ambrosia trifida var. trifida© J.W. Hardin | Original Image ⭷

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Horticultural Information

No horticultural data found for this taxon.

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