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This is an annual herb usually growing up to 2 m (6 ft 7 in) tall, but known to reach over 6 m (20 ft) in rich, moist soils. The tough stems have woody bases and are branching or unbranched. Most leaves are oppositely arranged. The blades are variable in shape, sometimes
391:
Herbicide resistant giant ragweed populations were first identified in the late 1990s. Across much of the midwestern United States, populations resistant to group 2 (ALS-inhibitors) and group 9 (glyphosate) are present, though resistant to multiple herbicide modes of action has not yet been
396:
is more widespread than documented and many states like
Minnesota offer free screening of giant ragweed for herbicide resistance For chemical control, use of group 4 (2-4D) and group 10 (glufosinate) are effective.
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occurs when its spiny burs fall off the plant and are carried to new habitat by people, animals, machinery, or flowing water. The plant is destructive to native and crop plants because it easily
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413:. It is one of the most familiar allergenic ragweeds, and residents of different regions begin to experience allergic symptoms as the plant spreads into the area.
340:
palmate with five lobes, and often with toothed edges. The largest can be over 25 cm (9.8 in) long by 20 cm (7.9 in) wide. They are borne on
1273:
456:. The plant is suspected to have been domesticated by Native Americans as a oily seed crop as early as 1200BCE. This means it may have been a member of the
715:
Washitani, I. (2001). Plant conservation ecology for management and restoration of riparian habitats of lowland Japan. Population
Ecology, 43(3), 189-195.
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containing both pistillate and staminate flowers. The former are clustered at the base of the spike and the latter grow at the end. The fruit is a
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in others. It grows in many types of disturbed habitat, such as roadsides, and in cultivated fields. Widespread
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several centimeters long. They are glandular and rough in texture. The species is
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Also, interest is great in preventing the spread of this plant because its
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Cloning the cDNA encoding the AmbtV allergen from giant ragweed (
827:
Abrams, Elliot M.; Freter, AnnCorinne; Stefanova, Vania (2014).
292:
1066:
939:
817:
Native
American Ethnobotany. University of Michigan, Dearborn.
755:"Herbicide-resistant weed screening survey in agronomic crops"
353:
656:
Encycloweedia. California
Department of Food and Agriculture.
356:
a few millimeters long tipped with several tiny spines.
948:
860:"Ragweed: Curse or Blessing, the Choice is Yours"
730:"Management of Herbicide-Resistant Giant Ragweed"
259:, is a species of flowering plant in the family
636:Integrated Taxonomic Information System (ITIS).
463:Giant ragweed has been used successfully as a
706:includes photos and European distribution map
8:
936:
295:in many regions. Its common names include
50:
31:
20:
376:in some areas, and it is recorded as an
611:United States Department of Agriculture
602:Germplasm Resources Information Network
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392:documented. There remains concern that
287:It is present in Europe and Asia as an
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424:had a number of uses for the plant as
833:Midcontinental Journal of Archaeology
753:Sarangi, Debalin (10 December 2020).
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7:
793:The history and impacts of airborne
681:Flora of China Vol. 20-21 Page 877
578:The Plant List Ambrosia trifida L.
919:University of California, Berkeley
14:
866:. Permaculture Research Institute
728:Davis, Vince (10 December 2020).
1367:urn:lsid:ipni.org:names:315739-2
923:
761:from the original on 2020-10-21.
742:from the original on 2015-10-11.
689:Linnaeus, Sp. Pl. 2: 987. 1753.
529:
517:
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493:
481:
364:This species is well known as a
73:
797:(Asteraceae) pollen in Hungary.
467:activator and an ingredient in
291:, and it is known as a common
1:
858:Stallings, Ben (2014-06-20).
607:Agricultural Research Service
1479:Flora of Northwestern Mexico
1474:Flora of Northeastern Mexico
458:Eastern Agricultural Complex
267:, where it is widespread in
1494:Taxa named by Carl Linnaeus
700:Altervista Flora Italiana,
1510:
1484:Flora of the United States
1459:NatureServe secure species
791:Makra, L., et al. (2005).
771:Ghosh, B., et al. (1991).
16:Species of flowering plant
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70:Scientific classification
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1489:Plants described in 1753
538:Carl Axel Magnus Lindman
432:used it as a remedy for
899:Great Ragweed –
671:The Jepson eFlora 2013.
568:Flora of North America.
409:is a significant human
905:Nature Manitoba. 2011.
524:Tall specimen in Texas
348:, with plants bearing
238:Ambrosia integrifolia
932:at Wikimedia Commons
685:san lie ye tun cao
426:traditional medicine
394:herbicide resistance
301:Texan great ragweed
42:Conservation status
894:NatureServe. 2013.
289:introduced species
263:. It is native to
1446:
1445:
1300:Open Tree of Life
942:Taxon identifiers
928:Media related to
864:Permaculture News
452:used it to treat
378:adventive species
317:perennial ragweed
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910:Ambrosia trifida
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536:Illustration by
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422:Native Americans
388:them for light.
370:invasive species
252:Ambrosia trifida
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273:United States
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283:Distribution
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1248:NatureServe
1163:iNaturalist
974:Wikispecies
897:Reaume, T.
616:22 December
469:sheet mulch
386:outcompetes
374:naturalized
335:Description
325:buffaloweed
113:Angiosperms
60:NatureServe
1453:Categories
1407:WisFlora:
1336:Plant List
1028:Calflora:
545:References
448:, and the
346:monoecious
261:Asteraceae
159:Asteraceae
1119:200023073
1106:200023073
1038:Cal-IPC:
915:CalPhotos
845:0146-1109
777:) pollen.
471:gardens.
446:pneumonia
360:As a weed
321:horseweed
177:Species:
149:Asterales
83:Kingdom:
1387:VASCAN:
1375:Tropicos
1341:gcc-7636
1253:2.129141
1204:10209163
1191:176138-1
1018:BioLib:
1011:286-31-6
965:Q3090517
959:Wikidata
795:Ambrosia
759:Archived
737:Archived
652:Ambrosia
454:diarrhea
450:Iroquois
430:Cherokee
411:allergen
372:. It is
342:petioles
329:kinghead
221:Synonyms
170:Ambrosia
155:Family:
139:Asterids
126:Eudicots
1436:1084559
1380:2700037
1142:3110588
913:in the
870:27 June
475:Gallery
465:compost
255:, the
165:Genus:
145:Order:
87:Plantae
58: (
56:Secure
1349:PLANTS
1305:465428
1155:103827
1129:AMBTRI
1126:FoIO:
1093:156319
1067:468221
1008:APSA:
988:AoFP:
843:
500:Leaves
444:, and
428:. The
407:pollen
327:, and
277:Mexico
271:, the
269:Canada
1431:WoRMS
1397:WiO:
1325:PFI:
1230:36521
1199:IRMNG
1175:IPA:
1168:53034
1088:EUNIS
1080:AMBTR
1021:41608
998:APA:
800:Grana
740:(PDF)
733:(PDF)
683:δΈθ£εΆθ±θ
488:Habit
442:fever
438:hives
133:Clade
120:Clade
107:Clade
94:Clade
1410:2505
1390:2795
1362:POWO
1354:AMTR
1328:5573
1313:PfaF
1292:6409
1279:4214
1274:NCBI
1225:ITIS
1217:4693
1186:IPNI
1178:5097
1150:GRIN
1137:GBIF
1075:EPPO
1054:CPQH
991:3608
872:2014
841:ISSN
780:Gene
654:spp.
618:2017
417:Uses
293:weed
212:1753
1418:WFO
1261:NBN
1240:215
1212:ISC
1114:FoC
1101:FNA
1062:EoL
1049:CoL
1031:300
1001:506
354:bur
279:.
233:DC.
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