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Ambrosia artemisiifolia L.
RAGWEED
Ambrosia elatior L; Annual ragweed; Rgweed

Life   Plantae   Dicotyledoneae   Asteraceae   Ambrosia

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Ambrosia artemisiifolia
© Copyright Bobby Hattaway 2011 · 5
Ambrosia artemisiifolia
Ambrosia artemisiifolia
© Copyright Bobby Hattaway 2011 · 5
Ambrosia artemisiifolia

Ambrosia artemisiifolia
© Les Mehrhoff, 2008-2010 · 4
Ambrosia artemisiifolia
Ambrosia artemisiifolia
© Les Mehrhoff, 2008-2010 · 4
Ambrosia artemisiifolia

Ambrosia artemisiifolia, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia artemisiifolia, inflorescence - whole - unspecified
Ambrosia artemisiifolia, inflorescence - whole - male
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia artemisiifolia, inflorescence - whole - male

Ambrosia artemisiifolia, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia artemisiifolia, leaf - basal or on lower stem
Ambrosia artemisiifolia, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia artemisiifolia, stem - showing leaf bases

Ambrosia artemisiifolia, inflorescence - whole - female
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia artemisiifolia, inflorescence - whole - female
Ambrosia artemisiifolia
© Copyright Malcolm Storey 2011-2117 · 3
Ambrosia artemisiifolia

Ambrosia artemisiifolia
© Copyright Malcolm Storey 2011-2117 · 3
Ambrosia artemisiifolia
Ambrosia artemisiifolia
© Copyright Malcolm Storey 2011-2117 · 3
Ambrosia artemisiifolia

Ambrosia artemisiifolia
© Copyright Malcolm Storey 2011-2117 · 3
Ambrosia artemisiifolia
Ambrosia artemisiifolia
© Copyright Malcolm Storey 2011-2117 · 3
Ambrosia artemisiifolia

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo cubicus @ BPI (2)

Albugo tragopogonis @ 186318A (1); BPI (49); 187869B (1)
Aphididae  Aphis ( @ CSUC_TCN (3); NCSU_ENT (3)

Capitophorus @ CSCA_TCN (5)

Pleotrichophorus ambrosiae @ NCSU (4)

Pleotrichophorus wasatchii @ NCSU (3)

Uroleucon ( @ NCSU (95)
Braconidae  Aphidius ( @ AMNH_PBI (3)
Cicadellidae  Ceratagallia ( @ UCR_ENT (3)

Empoasca curvexa @ III (1)

Empoasca deckeri @ III (1)

Empoasca erigeron @ III (1)

Empoasca plebeia @ III (1)
Cicadidae  Tibicen chloromera @ MEMU_ENT (1)
Coccinellidae  Coccinella septempunctata @ I_LB (5)
Delphacidae  Stobaera azteca @ UDCC_TCN (1)

Stobaera concinna @ UDCC_TCN (8)
Dictyopharidae  Scolops pungens @ UDCC_TCN (1)
Dothioraceae  Metasphaeria ambrosiaecola @ BPI (2)
Endosphaeraceae  Rhodochytrium spilanthis @ BPI (11)

Rhodochytrium @ BPI (2)
Entomophthoraceae  Entomophthora @ BPI (1)
Entylomataceae  Entyloma compositarum @ BPI (29)

Entyloma polysporum @ BPI (28)

Entyloma @ BPI (1)
Erysiphaceae  Erysiphe ambrosiae @ BPI (1); 860157B (1)

Erysiphe cichoracearum @ BPI (69); 860157A (1)

Erysiphe lamprocarpa @ BPI (1)

Oidium ambrosiae @ BPI (1)
Flatidae  Cyarda @ UDCC_TCN (3)
Hyponectriaceae  Physalospora ambrosiae @ BPI (2)

Physalospora arthuriana @ BPI (1)
Membracidae  Acutalis tartarea @ UDCC_TCN (33); NCSU (92)

Campylenchia latipes @ NCSU (4); UDCC_TCN (9)

Entylia carinata @ NCSU (142); UDCC_TCN (69)

Micrutalis calva @ NCSU (1)

Publilia concava @ NCSU (10)
Miridae  Chlamydatus associatus @ AMNH_PBI (1)

Chlamydatus suavis @ AMNH_PBI (3)

Dimorphocoris atrans @ AMNH_PBI (1)

Gn_orthotylinigp5 sp_007 @ AMNH_PBI (1)

Hyaliodes vitripennis @ MEMU_ENT (2)

Keltonia sulphurea @ MEMU_ENT (9)

Lygus lineolaris @ MEMU_ENT (11)

Lygus @ AMNH_PBI (7)

Reuteroscopus ornatus @ AMNH_PBI (9)

Reuteroscopus unknown @ AMNH_PBI (12)

Slaterocoris ambrosiae @ AMNH_PBI (1)

Taylorilygus apicalis @ MEMU_ENT (2); AMNH_PBI (3)
Mycosphaerellaceae  Cercospora ferruginea @ BPI (1)

Septoria epambrosiae @ BPI (1)
Nectriaceae  Fusarium @ BPI (1)
Noctuidae  Diphthera festiva @ I_TQBH (1)
Peronosporaceae  Peronospora halstedii @ BPI (1)

Plasmopara halstedii @ 187869A (1); BPI (32)
Phaeosphaeriaceae  Ophiobolus anguillides @ BPI (10)

Ophiobolus fulgidus @ BPI (1)
Phyllachoraceae  Phyllachora ambrosiae @ BPI (19)
Protomycetaceae  Protomyces andinus @ BPI (4)
Psathyrellaceae  Ozonium omnivorum @ BPI (1)
Pseudococcidae  Chorizococcus shaferi @ MEMU_ENT (2)
Pucciniaceae  Puccinia canaliculata @ BPI (1)

Puccinia xanthii @ BPI (12)

Uromyces junci @ BPI (3)
Stictidaceae  Stictis radiata @ BPI (1)
Trichogrammatidae  Ufens @ UCRC_ENTA (1)
Tropiduchidae  Pelitropis rotulata @ UDCC_TCN (1)
Uropyxidaceae  Aecidium compositarum @ BPI (1)
Xylariaceae  Sphaeria acuminata @ BPI (1)
_  Gn_ms_granitohyoidea sp_wa0909msp119 @ AMNH_PBI (1)

Tiryus fuscosignatus @ AMNH_PBI (1)

Xenosporella berkeleyi @ BPI (1)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Ambrosia artemisiifolia L. Ragweed
Asteraceae — Aster family
Native
Ambrosia artemisiifolia
Carousel Farm Park
September 2002

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Ambrosia artemisifolia  L. - Common Ragweed

Ambrosia artemisifolia plant

Family - Asteraceae

Stems - No info. yet.

Leaves - No info. yet.

Ambrosia artemisifolia leaf

Inflorescence - No info. yet.

Flowers - No info. yet.

Ambrosia artemisifolia flowers

Flowering - July - November.

Habitat - Fallow and waste fields, disturbed sites, pastures, glades, roadsides, railroads.

Origin - Native to U.S.

Other info. - This species, commonly called "Ragweed", is a tough plant for allergy sufferers. The plant is a major source of Hay Fever for many people that live within range of its pollen. Cattle and livestock are said to be sickened by eating the plant and it is often ignored in pastures.
A. artemisifolia was used by natives as a rub for insect bites and other skin ailments. A tea prepared from the roots and leaves was used to treat menstrual pains and other internal ailments.
This species is found throughout Missouri.

Photographs taken in Winter Haven, FL., 6-28-02.


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FNA Vol. 21 Page 11, 15 , 16 , 18 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Ambrosia

13. Ambrosia artemisiifolia Linnaeus, Sp. Pl. 2: 988. 1753.

Petite herbe à poux

Ambrosia artemisiifolia var. elatior (Linnaeus) Descourtilz; A. artemisiifolia var. paniculata (Michaux) Blankinship; A. elatior Linnaeus; A. glandulosa Scheele; A. monophylla (Walter) Rydberg

Annuals, 10—60(—150+) cm. Stems erect. Leaves opposite (proximal) and alternate; petioles 25—35(—60+) mm; blades deltate to lanceolate or elliptic, 25—55(—90+) × 20—30(—50+) mm, 1—2-pinnately lobed, bases cuneate, ultimate margins entire or toothed, abaxial faces sparsely pilosulous to strigillose, adaxial faces strigillose, both gland-dotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5—1.5 mm; involucres shallowly cup-shaped (usually without black nerves), 2—3+ mm diam., glabrous or hispid to pilosulous; florets 12—20+. Burs: bodies ± globose to pyriform, 2—3 mm, ± pilosulous, spines or tubercles 3—5+, near middles or distal, ± conic to acerose, 0.1—0.5+ mm, tips straight. 2 n = 34, 36.

Flowering Jul—Oct. Wet to dry soils, disturbed sites; 0—1000+ m; Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask.; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.

Hybrids between Ambrosia artemisiifolia and A. psilostachya have been called A. × intergradiens W. H. Wagner. The name Ambrosia × helenae Rouleau applies to hybrids between A. artemisiifolia and A. trifida .

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Updated: 2017-11-20 04:23:02 gmt
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