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Flower visits are a resource-use proxy, not confirmed feeding or pollination. Missing evidence is unknown. 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In Virginia, apparently first collected in 2000.","graphic_key_source_attributes":{"Attr0":"gr08","Attr1":"nc_cp,nc_pd,sc_cp,sc_mt,ga_cp,","Attr10":"en,to","Attr11":"dk","Attr13":"gr,nc,ye","Attr14":"none","Attr2":"Dry,Moist","Attr3":"Part,Sun","Attr3a":"y,n","Attr3a_subregion":"native_nc_cp:y,native_nc_pd:y,native_sc_cp:y,native_ga_cp:y,","Attr4":" 6-12","Attr5":"pu","Attr6":"n","Attr7":"n","Attr8":"alt,opp","Attr9":"lc"},"habitat_description":"Calcareous prairies (westwards); in loamy sandy soil of flats and slight depressions in periodically burned longleaf pine uplands; also in disturbed areas.","habitat_light_categories":["Partial shade","Full sun"],"habitat_moisture_categories":["Dry","Moist"],"heliophily_index":8,"phenology_source_text":"Jul-Nov.","regional_wetland_indicators":[{"source_column":"WetlandStatus1","value":"FAC"},{"source_column":"WetlandStatus2","value":"FAC"},{"source_column":"WetlandStatus3","value":"FACU"},{"source_column":"WetlandStatus4","value":"FAC"},{"source_column":"WetlandStatus5","value":"FACU"}],"taxonomic_synonymy":"[= Ar, C, Can, Fl7, FNA21, G, GrPl, Il, K4, Mi, NcTx, NE, NSProv, NY, Oh3, Ok, Pa, POWO, SE1, Tx, McMillan & Prevost (2022); = Ambrosia pilostachya — WH3, misspelling; = Ambrosia rugelii Rydberg — S; > Ambrosia coronopifolia Torrey & A. Gray — K1, NS; > Ambrosia psilostachya DC. — K1, NS, RAB; > Ambrosia psilostachya DC. var. coronopifolia (Torrey & A. 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The main stem rises from shallow (2 inches [5 cm]) or deep, branching rhizomes which extend down 3 to 6 feet (0.9-1.8 m) [6,70]. Stems are slender and branched, usually 1 to 2 feet (30-60 cm) tall [59,70]. Plants are monoecious with unisexual flowers; male flowers occur at the top of the plant and female flowers are axillary [41]. Achenes have a short beak and small blunt tubercles on top [41].","source_section":"Ambrosia psilostachya, Cuman ragweed / Botanical Description","source_sha256":"e2873ef3a42f555d2ae5f62170871ad4efdab1106725d25efdb19f6897845adb","source_title":"Fire Effects Information System: Ambrosia psilostachya","source_url":"https://research.fs.usda.gov/feis/species-reviews/ambpsi"}],"values":{"height_description":"usually 1 to 2 feet (30-60 cm) tall"}},"minnesota_wildflowers":{"matched_name":"Ambrosia psilostachya","retrieved":"2026-10-04T02:30:54.391753+00:00","scope":{"kind":"unspecified"},"scope_note":"Source-reported species characteristics; not a location-specific estimate.","source_label":"Minnesota Wildflowers","source_sha256":"5343e15328a6a97a0a9006ef12154c9b6cb404f5a36e52985ddef034f42d0b14","source_url":"https://www.minnesotawildflowers.info/flower/western-ragweed","trait_evidence":[{"expected_source_name":"Ambrosia psilostachya","field":"height_description","original_field":"height","record_id":"trait:0c2638f4eace5f0f2561e802eefa269ef1be4efe15db43fffdf7b28bae4ce1e1","retrieved_at":"2026-10-04T02:30:54.391753+00:00","scope":{"kind":"unspecified"},"scope_note":"Species profile; 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incoming source differs"],"light":["Existing displayed guidance retained; incoming source differs"],"moisture_categories":["Existing displayed guidance retained; incoming source differs"]},"matched_name":"Ambrosia psilostachya","retrieved":"2026-10-05T19:48:33.241724+00:00","scope":{"kind":"unspecified"},"scope_note":"Source-reported species characteristics; not a location-specific estimate.","source_label":"Lady Bird Johnson Wildflower Center","source_sha256":"541e4657a9b6e8ce771695165ec1b0a0d3c3080629469aa251ec3fd7aafcde22","source_url":"https://www.wildflower.org/plants/result.php?id_plant=AMPS","trait_evidence":[{"expected_source_name":"Ambrosia psilostachya","field":"height_description","original_field":"height","record_id":"trait:16c41a802e0b5d7275d2bc90f17509cf1dfd386eea41f196c795f5fb795c9d3f","retrieved_at":"2026-10-05T19:48:33.241724+00:00","scope":{"kind":"unspecified"},"scope_note":"Species profile; distribution and native-status discovery filters do not establish local growing or bloom timing.","source":"wildflower","source_name":"Ambrosia psilostachya","source_sha256":"541e4657a9b6e8ce771695165ec1b0a0d3c3080629469aa251ec3fd7aafcde22","source_url":"https://www.wildflower.org/plants/result.php?id_plant=AMPS","status":"eligible_fact","taxon_id":"taxon:4eeb1556-73ac-5026-95d7-a81f8bd5e07f","value":{"approximate":true,"kind":"upper_bound","max":3,"unit":"feet"}},{"expected_source_name":"Ambrosia psilostachya","field":"moisture_categories","original_field":"soil_moisture","record_id":"trait:687b3869fdb48784f7be270ed5fe749154d718ed3eff8e81e91d9ff1a6812dd5","retrieved_at":"2026-10-05T19:48:33.241724+00:00","scope":{"kind":"unspecified"},"scope_note":"Species profile; 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distribution and native-status discovery filters do not establish local growing or bloom timing.","source":"wildflower","source_name":"Ambrosia psilostachya","source_sha256":"541e4657a9b6e8ce771695165ec1b0a0d3c3080629469aa251ec3fd7aafcde22","source_url":"https://www.wildflower.org/plants/result.php?id_plant=AMPS","status":"eligible_fact","taxon_id":"taxon:4eeb1556-73ac-5026-95d7-a81f8bd5e07f","value":["Perennial"]},{"expected_source_name":"Ambrosia psilostachya","field":"flower_color","original_field":"flower_color","record_id":"trait:edbb9dd37e5805323e26f9d064df519a5c80eb77993f85271ca8a0f7fa471cb2","retrieved_at":"2026-10-05T19:48:33.241724+00:00","scope":{"kind":"unspecified"},"scope_note":"Species profile; distribution and native-status discovery filters do not establish local growing or bloom timing.","source":"wildflower","source_name":"Ambrosia psilostachya","source_sha256":"541e4657a9b6e8ce771695165ec1b0a0d3c3080629469aa251ec3fd7aafcde22","source_url":"https://www.wildflower.org/plants/result.php?id_plant=AMPS","status":"eligible_fact","taxon_id":"taxon:4eeb1556-73ac-5026-95d7-a81f8bd5e07f","value":["White","Green"]}],"values":{"flower_color":["White","Green"],"height_description":"Up to about 3 feet","life_cycle":["Perennial"],"light":["Sun","Part Shade"],"moisture_categories":["Dry"]}}},"light_range":["part shade","full sun"],"light_source":"FloraQuest: Carolinas, Georgia (Southeastern Flora Team)","native_synthesis":{"claims":[{"claim":"native","matched_name":"Ambrosia psilostachya","scope":"TN-KY","source":"tnky_atlas","url":"https://tennessee-kentucky.plantatlas.usf.edu/plant/species/1168"},{"claim":"native","matched_name":"Ambrosia psilostachya","scope":"L48","source":"usda","text":"CAN:N L48:N","url":"https://plants.usda.gov/"},{"claim":"native","matched_name":"Ambrosia psilostachya","scope":"NC","source":"nc_flora","url":"https://auth1.dpr.ncparks.gov/flora/"},{"claim":"native","matched_name":"Ambrosia psilostachya and Ambrosia rugelii","scope":"NC","source":"nc_flora","url":"https://auth1.dpr.ncparks.gov/flora/"}],"county_native_range":"unresolved","explanation":"Source scopes are preserved. State occurrence alone does not establish nativity; combined regional evidence is labeled estimated.","label":"Native to South Carolina (estimated from combined sources)","rule":"southeast-native-synthesis-1","status":"native_inferred"},"source_name":"Ambrosia psilostachya","taxon_id":"taxon:4eeb1556-73ac-5026-95d7-a81f8bd5e07f","revision":"publish:5809c037-0e9a-430a-8008-5ab6f69800c0","photos":[]}