Ambrosia artemisiifolia L., Sp. Pl. 988 1753. (Syn: Iva monophylla Walt.);
USA (Connecticut, District of Columbia, Illinois, Massachusetts, Maine, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Vermont), Canada (Newfoundland, Nova Scotia, Ontario, Prince Edward Isl., Quebec), Australia (I) (Western Australia (I), Queensland (I), New South Wales (I)), Java (I), Peru (I), South Africa (I) (widespread), Zambia (I), Botswana (I), trop. Africa (I), China (I), Japan (I), Taiwan (I), Mauritius (I), Iran (I) (N-Iran (I)), Afghanistan (I), Madeira (I) (Madeira Isl. (I)), Hawaii (I) (Kauai (I), Oahu (I), Molokai (I), Maui (I), Hawaii Isl. (I)), Java (I), India (I), England (I), Channel Isl. (I), Ireland (I), Northern Ireland (I), Norway (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), Poland (I), Czech Republic (I), Slovakia (I), Hungary (I), Slovenia
(I), Croatia (I), Bosnia & Hercegovina (I), Serbia & Kosovo (I), Albania (I), Romania (I), Bulgaria (I), Greece (I), Madeira (I), Algeria (I), ?Libya (I), Anatolia (I), Egypt (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), Armenia (I), Azerbaijan (I), Korea (I), Kyrgyzstan (I), Kazakhstan (I), Uzbekistan (I)
as per Catalogue of Life;
Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, and American Wormwood;

Ambrosia artemisiifolia_RKC01_20022012:
Ambrosia artemisiifolia L.
Family: Asteraceae
Locality: Daeejeon, S. Korea
Date: September, 2011.
A common weed native to N. America.

Beautiful … Also found in India???

This is also reported from India.

To me it does not look like Ambrosia artemisiifolia

Please ignore my earlier message. It is A. artemisiifolia only.


Fwd: Kind Request to process for identification : 4 posts by 2 authors.
I dare to request you to process the following plant species recently collected from Apatani valley of Arunachal Pradesh, which is used to prepare salt by the apatanese since time immemorial.
Date of Collection: 21/11/2014
Locality: Sibe Village, Hapoli, Lower Subansiri District in Arunachal Pradesh
Coll. No. S. Panda & P Roy 22
Altitude: 5400 ft
Flowers: minute, greenish-yellow
Sorry to say that plants images are not good.

it looks like Ambrosia sp. of asteraceae

I think it would be Ambrosia artemisiifolia (Asteraceae)……

Thank you … for your processing for id, and to my brother in BSI, … who, I think, correctly identified this taxon.


Ambrosia artemisiifolia from Canada : 1 post by 1 author.

Ambrosia artemisiifolia from Mississauga Canada, August 23, 2019. I am uploading this species because it is reported to be invasive in India, but not uploaded on any of our Groups or Flowers of India. Also because A. psilostachya, which closely resembles above species has been reported by Ramachandra Prasad et al., 2013. The two are separated as under:
A. artemisiifolia: Plants annual, erect, leaves 1-2-pinnately lobed, petioles 2.5-6 cm long.
A. psilostachya: Plants perennial, leaves 1-pinnately lobed, petioles shorter than 2.5 cm

more images clicked from Brampton Canada on 8-11-2022
3 more images.

Ambrosia artemisiifolia from Canada-GS07032020-1 : 1 post by 1 author. Attachments (2)
Ambrosia artemisiifolia L.
Common name:  Common ragweed, Annual ragweed,  
Annual herb native of North America with pinnately divided Artemisia like leaves, small green flowerheads in erect spikes, pollen highly allergic.
Clicked from Rattray Marsh, Mississauga, Canada, August 23, 2019.