Galinsoga quadriradiata Ruiz & Pav., Syst. veg. fl. peruv. chil. 1:198. 1798 (Syn: Adventina ciliata Rafin.; Ageratum perplexans M. F. Johnson; Baziasa urticifolia (Kunth) Steud.; Galinsoga allaeocarpa Spreng. (ambiguous synonym); Galinsoga aristulata E. P. Bickn.; Galinsoga bicolorata St. John & White; Galinsoga brachystephana Regel; Galinsoga caracasana (DC.) Sch. Bip.; Galinsoga ciliata (Rafin.) S. F. Blake; Galinsoga eligulata Cuatrec.; Galinsoga hispida Benth.; Galinsoga humboldtii Hieron.; Galinsoga parviflora var. caracasana (DC.) A. Gray; Galinsoga parviflora subsp. hispida (DC.) O. de Bolòs & J.
Vigo; Galinsoga parviflora subsp. hispida (DC.) O. de Bolòs & J.
Vigo; Galinsoga parviflora subsp. quadriradiata (Ruiz & Pav.) Pers.; Galinsoga quadriradiata f. albiflora Thell.; Galinsoga quadriradiata var. hispida (DC.) Thell.; Galinsoga quadriradiata f. purpurascens Thell.; Galinsoga quadriradiata f. vargasiana Thell.; Galinsoga urticifolia (Kunth) Benth.; Jaegeria urticifolia (Kunth) Spreng.; Sabazia urticifolia (Kunth) DC.; Sabazia urticifolia var. venezuelensis Steyerm.; Stemmatella lehmannii Hieron.; Stemmatella urticifolia (Kunth) O. Hoffm. ex Hieron.; Stemmatella urticifolia var. eglandulosa Hieron.; Vargasia caracasana DC.; Vasargia caracasana (DC.) Steud.; Wiborgia urticifolia Kunth);         
Venezuela (Aragua, Distrito Federal, Lara, Merida, Miranda, Monagas, Tachira,
Trujillo), Bolivia (Cochabamba, La Paz, Santa Cruz, Tarija), SE-Brazil (Sao
Paulo, Rio de Janeiro), Argentina (Catamarca, Cordoba, Jujuy, Salta, Tucuman),
S-Brazil (Rio Grande do Sul, Santa Catarina), Mexico (Sonora, Sinaloa,
Chihuahua, Durango, Zacatecas, Aguascalientes, San Luis Potosi, Guanajuato,
Queretaro, Hidalgo, Nayarit, Jalisco, Colima, Michoacan, Mxico State, Distrito
Federal, Morelos, Puebla, Tlaxcala, Veracruz, Guerrero, Chiapas)), Peru, Costa
Rica, Guatemala, Honduras, El Salvador, Ecuador, Panama, Colombia (Antioquia,
Boyac, Cauca, Cundinamarca, Huila, La Guajira, Magdalena, Nario, Putumayo,
Risaralda, Santander, Tolima, Valle), Nicaragua, Bahamas (I), Jamaica (I),
Puerto Rico (I), Lesser Antilles (I) (Dominica (I), Guadeloupe (I), Martinique
(I)), USA (I) (Alberta (I), British Columbia (I), Manitoba (I), New Brunswick
(I), Nova Scotia (I), Ontario (I), Prince Edward Isl. (I), Quebec (I),
Saskatchewan (I)), USA (I) (Alabama (I), Arkansas (I), Colorado (I), Connecticut
(I), Delaware (I), District of Columbia (I), Florida (I), Georgia (I), Illinois
(I), Indiana (I), Iowa (I), Kansas (I), Kentucky (I), Maine (I), Maryland (I),
Massachusetts (I), Michigan (I), Minnesota (I), Missouri (I), Nebraska (I), New
Hampshire (I), New Jersey (I), New York (I), North Carolina (I), North Dakota
(I), Ohio (I), Pennsylvania (I), Rhode Island (I), South Carolina (I), Tennessee
(I), Vermont (I), Virginia (I), Washington (I), West Virginia (I), Wisconsin
(I)), Azores (I) (Santa Maria Isl. (I), Sao Miguel Isl. (I), Terceira (I), Sao
Jorge (I), Faial (I)), Madeira (I) (Madeira Isl. (I)), Canary Isl. (I) (Tenerife
(I), Gomera (I)), Cape Verde Isl. (I) (Ilha de Sao Nicolau (I), Fogo Isl. (I),
Ilha Brava (I)), Hawaii (I) (Oahu (I), Molokai (I), Maui (I), Hawaii Isl. (I)),
India (throughout (I)), Bangladesh (I), Nepal (I), Darjeeling (I), Sikkim (I),
Vietnam (I), Russian Far East (I), South Africa (I) (widespread), Swaziland (I),
trop. Africa (I), Central African Republic (I), Ethiopia (I), Eritrea (I),
Zimbabwe (I), Cameroon (I), Bioko Isl. (Fernando Poo) (I), England (I), Channel
Isl. (I), Ireland (I), Northern Ireland (I), Norway (I), Sweden (I), Finland
(I), France (I), Portugal (I), Spain (I), Denmark (I), Netherlands (I), Belgium
(I), Luxembourg (I), Germany (I), Switzerland (I), Austria (I), Liechtenstein
(I), Italy (I), Corsica (I), Sicily (I), Poland (I), Czech Republic (I),
Slovakia (I), Hungary (I), Slovenia (I), Croatia (I), Bosnia & Hercegovina
(I), Serbia & Kosovo (I), Montenegro (I), Macedonia (I), Romania (I),
Bulgaria (I), Greece (I), Morocco (I), East Aegaean Isl. (I), Anatolia (I),
Cyprus (I), Estonia (I), Latvia (I), Lithuania (I), Kaliningrad region (I),
Belarus (I), Moldova (I), Ukraine (I), Crimea (I), European Russia (I), Northern
Caucasus (I), Georgia [Caucasus] (I), Korea (I), China (I) (Jiangxi (I)), Taiwan
(I),
Japan (I), Tajikistan (I)
as per Catalogue of Life;
Galinsoga parviflora: upper part of the stem not hairy or with short and sparse simple hairs
Galinsoga quadriradiata: upper part of the stem with glandular hairs and dense simple hairs
 


Galinsoga quadriradiata is a species of flowering plant in the daisy family which is known by several common names, including shaggy soldier, hairy galinsoga, and fringed quickweed.

It is found throughout most of the temperate world, but apparently its native home is Mexico. In Portuguese-speaking countries where it is widely naturalized – e.g. in Brazil – it is known as botão-de-ouro.
As an agricultural weed it can reduce crop yields by up to 50%.[1]
This is an annual herb which varies in appearance. The main stem reaches anywhere from 10 to 60 centimeters in height and may branch or not. The petioled leaves are oval and serrated and are covered in a coat of soft hairs. The small flower heads are up to a centimeter wide and have rounded center filled with many disc florets usually in a shade of bright yellow. There are five white ray florets widely spaced around the center, each an oval shape with one or two deep notches in the end. The fruit is a small achene with a large pappus.
(From Wikipedia  on 20.5.13)
  

 

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ANMAR31/51 Please identify this herb : 4 posts by 3 authors. Attachments (5)

Family: Asteraceae
Date: September 2014
Place: Chikamagalur, Karnataka

Habit: Herb
Habitat: Disturbed land in the high altitude grasslands
The branches are covered with short appressed hair and long bristly hair while leaves are with only the bristly hair. Pedicle and calyx of the flower is with glandular hair. All of this can be seen in the photos. 


Looks like Tridax procumbens


Looks more like Galinsoga sp.. Check for Galinsoga quadriradiata..


Thank you very much sir. Is it an exotic or a native species?

This is the key given by …:

Galinsoga Ruiz & Pavon has two species in India which are differentiated as follows (based on Chowdhery 1995 in Flora of India Vol-12):
Stems densely glandular hairy; ray florets 5-8mm, pales of the disc florets entire; pappus scale awn tipped………G.quadriradiata
Stems glabrescent; ray florets not exceeding 4mm; pales of the disc floret 2-3fid; pappus scale not awn tipped .. G.parviflora


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Galinsoga parviflora Cav. ?? : 10 posts by 4 authors. Attachments (6)
Location:  Kalimpong, WB, India
Date: 15 May 2018
Altitude: 4100 ft.
Habit : Wild.

I think Galinsoga quadriradiata as per details and keys herein and as per comparative images at Galinsoga 


not sure of its exact id but if it is Galinsoga parviflora Cav.

how does something from peru get into indian wilds.
i would like to know if any body has any report of it having been brought to india from the Kew
where it was once known as Kew weed?
Secondly, how wide spread is it in Kalimpong area? what native plants would it have replaced/displaced


http://www.flowersofindia.net/catalog/slides/Quick%20Weed.html ???


I see … write that its naturalize dth eworld over. I wonder how did it get there ? that was my question

wonder if anybody has written a paper about such spreads


So which one is this ?


Galinsoga species. This is seen in many places here. You need to compare all the characters to pinpoint the ID. Comparative images in the NET are confusing.


Thanks, …  In efi, we have keys as well comparative images as in my reply. 


 

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Galinsoga parviflora
Purandar Rainy season

Yes Very nice photographs


Though not clear, hair on the stem appears to be glandular hairy, so it may be Galinsoga quadriradiata as per keys herein.


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ID : Bidens or Acmella sp. from Kamrup district (Rural), Assam: Attaching images of what looks like�Bidens or Acmella sp.(?)
Date :01/12/2012
Location: Kamrup district(Rural),Assam
Habitat: Grows wild
Habit :herb
Head : Radiate, 4mm(long), termial or axillary
Phyllaries : 2 seriate, hairy.
Ray floret : 4mm long, white
Pappus : hairy, .9mm
Corolla : 3mm, 3 lobed
Ovary : 1mm long, margin hairy
Disc floret : 3mm long, disc floret 8.
Pappus : 1mm, hairy
Corolla : 5 lobed, 2mm, tube 1.8mm


Galinsoga parviflora


Though not clear, hair on the stem appears to be glandular hairy, so it may be Galinsoga quadriradiata as per keys herein.


Attached images are Galinsoga parviflora Cav. collected both from Shillong (Meghalaya) & Kamrup district(Assam)


Very good photographs


Though not clear, hairs on the upper part of the stem appears to have glandular & dense simple, so it may be Galinsoga quadriradiata as per keys herein.


Galinsoga parviflora Cav. 
gal-in-SOH-guh — named for Mariano Martinez Galinsoga, Spanish physicianDave’s Botanary
par-VEE-flor-uh or par-vi-FLOR-uh — small-floweredDave’s Botanary
commonly known as: chick weed, ciliate galinsoga, dumb-nettle, galinsoga, gallant soldier, potato weed, quick weed, small-flowered galinsoga, yellow weed • Manipuri: হমেঙ শমপাকপী hameng shampakpi • Tamil: மூக்குத்தி பூ mookuthi poo
Native of: s w USA south to South America; now a cosmopolitan weed
References: Flowers of IndiaFlora of North AmericaPIERNPGS / GRIN
at Purandar fort on 31 JUL 10

On checking enlarged images, though not clear, hairs on the upper part of the stem appears to have glandular & dense simple, so it may be Galinsoga quadriradiata as per keys herein.


Galinsoga parviflora from Mizoram.


Though not clear, hairs on the upper part of the stem appears to have glandular & dense simple, so it may be Galinsoga quadriradiata as per keys herein.

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Asteraceae Fortnight Part I-Radiate Heads: Galinsoga parviflora? from Shimla and Gori Valley- NS 53 : 3 correct images. 7 posts by 5 authors.

This common trailing herb is encountered many a times in the field… the shared shots are from Gori valley, Chakrata and Shimla, wanted to know if all of them belong to Galinsoga parviflora..


Yes Galinsoga parviflora without any doubt.


These specimens show considerable variability in size of ray florets, hairiness, serration of leaf margins; must be a mix of two species.
Galinsoga Ruiz & Pavon has two species in India which are differentiated as follows (based on  Chowdhery 1995 in Flora of India Vol-12):
Stems densely glandular hairy; ray florets 5-8mm, pales of the disc florets entire; pappus scale awn tipped……………………………G.quadriradiata
Stems glabrescent; ray florets not exceeding 4mm; pales of the disc floret 2-3fid; pappus scale not awn tipped ………………………G.parviflora
Both of these occur together. To me the pics from Shimla may be G.quadriradiata but without specimens difficult to determine.


In 2nd, 3rd and 6th image, though not clear, hairs on the upper part of the stem appears to have glandular & dense simple, so these may be Galinsoga quadriradiata as per keys herein.



 

Wild Weed For ID : Lalbagh,Bangalore : 291213 : AK-35 : Attachments (1). 5 posts by 3 authors.
A weed seen growing wild in the garden on 25/11/13.

Is it Tridax procumbens?


Resemble to Galinsoga parviflora. May be a different species of Galinsoga. It is not Tridax procumbens.


Thanks again …

The stalks seemed shorter, not long as in Tridax.
Thats the reason I put it up for id.


I think yes Galinsoga parviflora


Thanks for this id confirmation too


On going through Differences between Galinsoga quadriradiata & Galinsoga parviflora, I feel it may be Galinsoga quadriradiata


Hairs soft in G. parviflora vs stiff bristly in G. quadriradiata.


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Galinsoga parviflora – SN Mar – 2 : 2 posts by 2 authors. Attachments (2).

Galinsoga parviflora Cav.; Fam: Asteraceae

weed in the cofee estates, erect herb
Yercaud, Salem, Tamilnadu, altitude 1200m


Yes … A common weed here. (Delhi)


Though details are not clear, on going through Differences between Galinsoga quadriradiata & Galinsoga parviflora, I feel it may be Galinsoga quadriradiata


 

 

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Ground Cover Plant for ID, Sikkim NAW-JUN16-05 : 6 posts by 3 authors. Attachments (2)
Kindly identify this ground cover with white and yellow compound flowers photographed in Sikkim in May 2015.


Pl. check Tridax procumbens


Thank you … Quite a common weed, which i should have identified. I did think that this is an invasive, which has been confirmed.


agree with …


I think more closer to Galinsoga parviflora


I agree with you. G. parviflora.


Though details are not clear, on going through Differences between Galinsoga quadriradiata & Galinsoga parviflora, I feel it may be Galinsoga quadriradiata

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Galinsoga parviflora? ABJUL01/01 : 7 posts by 4 authors. 3 images.
I photographed these tiny flowers this evening on my phone thinking them to be Tridax Daisies (though they looked too small). Could these be Galingosa parviflora? Leaves were covered in long white hair. Please advise.
Above Mcleodganj, Dharamshala, HP

1800m
1 July 2016.


Yes …, it is Galinsoga parviflora……….


We take it as Galinsoga parviflora for present, but I request young researchers to be on look out for possible occurrence of G. quadriradiata in India. This Mexican species is fast spreading elsewhere:

1   Phyllaries persistent, usually glabrous; inner paleae 3-lobed, lobes 1/3+ total lengths, acute; disk pappus absent or of 15-20 often gray, sometimes white, linear, fimbriate, obtuse scales 0.5-2 mm. 1 G. parviflora

+  Phyllaries deciduous, usually with some stipitate glands; inner paleae entire or 2- or 3-lobed, lobes to 1/3 total lengths, blunt; disk pappus absent or of 1-5 or 14-20 white, lanceolate to oblanceolate, fimbriate, sometimes aristate, scales. 2 G. quadriradiata


Thank you … I will visit the plants with my camera soon and have a closer look. I will also collect a couple of heads and report back the observed characteristics.

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I brought a sample with 3-4 flower heads yesterday evening and looked under the microscope. The flower is too small to reveal its inner parts properly with my inadequate equipment. I am not able to make out much from these images but perhaps I am not looking properly. Please advise. 7 images.


Though details are not clear, on going through Differences between Galinsoga quadriradiata & Galinsoga parviflora, I feel it may be Galinsoga quadriradiata   

Requesting to please ID this plant captured abundantly growing on the roadside in Ooty in November 2013.


Should be Galinsoga parviflora


Thank you … for lead….

On going through Galinsoga parviflora on efi, I found this post by you:
In view of this, could these be Galinsoga quadriradiata?


efi page on Galinsoga parviflora & Galinsoga quadriradiata


Though details are not clear, on going through Differences between Galinsoga quadriradiata & Galinsoga parviflora, I feel it may be Galinsoga quadriradiata   



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180919EPT14 : 7 posts by 5 authors. Attachments (4) – around 450 kb each.

Presenting for ID
Location : Kodaikanal
Elevation : 5900 ft
Habitat : Roadside near water stream
Taken on 18th Sep 2019

Galinsoga quadriradiata

References 
Description here 
And pictures here 
http://www.missouriplants.com/Whiteopp/Galinsoga_quadriradiata_page.html


I also guessed so but could not dare to comment due to pinkish nature of petals but found one image in net today !

Missouriplants.com


some Ageratum?


I guess Galinsoga quadriradiata !


Thank you all for the ID help.
Thanks to … for the apt references..


 

26112019EPT31 : 3 posts by 3 authors. Attachments (5)- around 500 kb each. 
please confirm
cultivated at my home garden from Kodaikanal from altitude 5900 feet
Galinsoga parviflora
Location : Chennai outskirts
Date :24.11.2019
Elevation : 23 mts.

yes i know it as potato weed. FOI has a page


I think this should be Galinsoga quadriradiata Ruiz & Pav. as per keys and details herein.


 

26112019EPT30 : 6 posts by 3 authors. Attachments (5)

Dear members for ID this cultivated plant, a weed from Kodaikanal (Altitude 5000 ft)
cultivated at my garden
Location : Chennai outskirts
Date :24.11.2019
Elevation : 23 mts.


Is this Galinsoga parviflora


Yes.


Mookuthi poo in Tamil. 


I think Galinsoga quadriradiata as per keys and details herein. 


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