Ageratum conyzoides L., Sp. pl. 2:839. 1753, nom. cons. prop. ;
.
commonly known as: billy goat weed, tropical whiteweed • Bengali: uchunti • Hindi: जंगली पुदीना jungali pudina • Kannada: ಹೇಲುಕಸ helukasa, ನಾಯಿ ತುಳಸಿ naayi tulasi • Konkani: वोसाडी vosadi • Manipuri: খোংগজাঈ নপী khongjai napi • Marathi: घाणेरा ओसाडी ghanera osaadi • Sanskrit: विषामुष्टिः visamustih • Tamil: அப்பக்கொடி appa-k-koti • Telugu: పోకబంతి poka-banti ;
.
3 (2) Peduncles minutely puberulent and sparsely to densely pilose, eglandular; phyllaries oblong-lanceolate, abruptly tapering to subulate tips 0.5–1 mm, glabrous or sparsely pilose, margins often ciliate, abaxial faces eglandular   3 Ageratum conyzoides
+ Peduncles mixed pilose, stipitate-glandular, and viscid-puberulent; phyllaries narrowly lanceolate, gradually tapering to indurate-subulate tips 0.8–2 mm, margins not ciliate or inconspicuously ciliate, abaxial faces stipitate-glandular and sparsely to densely pilose   4 Ageratum houstonianum
.
1 Leaves basally cordate or truncate; phyllaries narrowly lanceolate, apex long acuminate, margin entire, stipitate glandular, with long hairs.   1 A. houstonianum
+ Leaves basally obtusely or broadly cuneate; phyllaries broad, oblong or lanceolate-oblong, acute, glabrous or with long, non-viscid hairs, eglandular.   2 A. conyzoides
.
Comparison of Ageratum conyzoides L. & Ageratum houstonianum Mill. as below:

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It (Ageratum houstonianum) has larger and robust plants and flowerheads with more florets than A.conyzoides.
.
In A conyzoides plants and phyllaries are not that densely hairy, and heads are smaller and more spreading
.
Thicker cordate leaves and longer hairs especially on involucre bracts are clearly seen in Ageratum houstonianum.
.
Ageratum L. genus is represented in India by two species- A. conyzoides and A.houstonianum.
These closely related pantropica weed species can be differentiated as follows:
Involucral bracts linear, sharply acute-acuminate, sparsely hairy; Corolla of the florets 1.5mm long, shorter than awned pappus scale…. A. conyzoides L.
Involucral bracts linear setaceous, densely hairy; Corolla of the florets 2.5mm long, as long as or longer than awned pappus …. A. haustonianum Mill.
.

Ageratum conyzoides (Billygoat-weed, Chick weed, Goatweed, Whiteweed; Ageratum conycoides L., Ageratum obtusifolium Lam., Cacalia mentrasto Vell.) is native to Tropical America, especially Brazil.

Herb 0.5–1 m. high, with ovate leaves 2–6 cm long, and flowers are white to mauve.[1] 
Ingesting A. conyzoides can cause liver lesions and tumors.[4][5] There was a mass poisoning incident in Ethiopia as a result of contamination of grain with A. conyzoides.[6] The plant contains the pyrrolizidine alkaloids lycopsamine and echinatine.
A. conyzoides is prone to becoming a rampant environmental weed when grown outside of its natural range. It is an invasive weed in Africa, Australia, Southeast Asia and the USA.[7][8] It is considered a moderate weed of rice cultivation in Asia.[9]

(From Wikipedia on 9.6.13)
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Herb ID request – RK38 – 28-Oct-2012: Request id of this small herb from Vasai region. It is only about 1 foot tall at the most.


This is Goat Weed [Ageratum conyzoides].


How to differentiate between Ageratum conyzoides and A haustonianum



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Plz id this herb: pa83 – 10jan2013: Plz id this herb with light bluish-white flowers from Yeoor region. It is growing on the rocky soil and is around 6 inches height only. The last pic is of the root. Tks.

I hope its a Eupatorium sp.


Please check for Ageratum conyzoides and A.haustinianum.


I also think this is Ageratum.


Ageratum conyzoides , Asteraceae



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Date/Time-Oct 2011
Location- Place, Altitude, GPS-Pune
Habitat- Garden/ Urban/ Wild/ Typewild
Plant Habit- Tree/ Shrub/ Climber/ Herbherb
Height/Lengthabout 1/2 feet to 1 feet
Leaves Type/ Shape/ Size- green
Flowers Size/ Colour/ Calyx/ Bractslight blue flowers
Fruits Type/ Shape/ Size Seeds-Not seen

Yes, I think this is Ageratum conyzoides, too.



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Attachments (8).   2 posts by 2 authors.

Attached images are Ageratum conyzoides L. collected from Kamrup district, Assam 



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Ageratum L. genus is represented in India by two species- A. conyzoides and A.houstonianum. Both of these species are not native in India but are invasive alien species originating in Tropical America. In Uttarakhand these reach up to 2000m altitude in the Himalaya.
These closely related pantropica weed species can be differentiated as follows:
Involucral bracts linear, sharply acute-acuminate, sparsely hairy; Corolla of the florets 1.5mm long, shorter than awned pappus scale…. A.conyzoides L.

Involucral bracts linear setaceous, densely hairy; Corolla of the florets 2.5mm long, as long as or longer than awned pappus …. A.haustonianum Mill.



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Ageratum conyzoides (L.) L.
ad-jur-RAY-tum — a plant that does not wither readilyDave’s Botanary
kon-ny-ZOY-deez — resembling Conyza (a type of fleabane)Dave’s Botanary
commonly known as: billy goat weed, tropical whiteweed • Bengali: uchunti • Hindi: जंगली पुदीना jungali pudina • Kannada: ಹೇಲುಕಸ helukasa, ನಾಯಿ ತುಳಸಿ naayi tulasi • Konkani: वोसाडी vosadi • Manipuri: খোংগজাঈ নপী khongjai napi • Marathi: घाणेरा ओसाडी ghanera osaadi • Sanskrit: विषामुष्टिः visamustih • Tamil: அப்பக்கொடி appa-k-koti • Telugu: పోకబంతి poka-banti
Native to: central and tropical South America; naturalized in tropics worldwide
References: Flowers of IndiaFRLHTWikipediaPIERFurther Flowers of Sahyadri by Shrikant
at Tungareshwar Wildlife Sanctuary on 30 NOV 09


Ageratum conyzoides (L.) L. 
Annual weed with usually white or light lilac flowers, ovate leaves and glabrous involucre bracts.
Photographed from Delhi and Mussoorie Chakrata Road.


Attachments (2). 2 posts by 2 authors.
Pics captured at Ovalekar Wadi, Thane in Sep 2012


Yes … Good photographs.


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Asteraceae Fortnight Part 2-Discoid heads:: Ageratum sp. for ID SMP 20 :  Attachments (1).  4 posts by 3 authors.

On searching my collection I found these pictures. Can it be Ageratum sp. ?? haustoniana??


Ageratum conyzoides


Yes, Ageratum conyzoides..



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Wild Weed For ID : Nasik : 250813 : AK-2 :  Attachments (1). 3 posts by 2 authors.

An old picture of mine.

Wild weed seen growing on a farm in Nasik on 17/10/2007.

Ageratum?


Yes, Ageratum conyzoides indeed..



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Shrub ID from Bangladesh SM133 : 2 posts by 2 authors. Attachments (1).

Habit: Shrub
Habitat: Wild

Location: Dhaka City


Likely to be Ageratum conyzoides..



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SYMBIOSIS : 696 : 1 post by 1 author. Attachments (1)

Attaching an image of Plain Tiger butterflies on the flowers of Ageratum conyzoides (GOAT WEED).



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SYMBIOSIS : 709 : 1 post by 1 author. Attachments (1)
Attaching an image of a Common Hedge Blue on flowers of Ageratum conyzoides (GOAT WEED).


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Ageratum species? ABSEP2016/51 : 2 posts by 2 authors. 5 images.
Please help with the identification of this Asteraceae. To me it appears to be an Ageratum species. Please advise.
Near Mcleodganj, HP 1800m approx. 27 September 2016

Ageratum conyzoides to me.



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TSP-JAN2016-18-18:Images of Ageratum conyzoides (Asteraceae) : 3 posts by 2 authors. Attachments (4)

It is my pleasure to share few images of Ageratum conyzoides (Asteraceae

Habit: Herb 

Habitat: Wild, occurring in open waste lands 

Sighting: Chikmagalur, Karnataka, about 1000 msl 

Date: 13-08-2014 and 12-02-2014



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Date/Time-Sep 2011
Request for identification
Location- Place, Altitude, GPS-Pune
Habitat- Garden/ Urban/ Wild/ Type-Garden
Plant Habit- Tree/ Shrub/ Climber/ Herb-  small plant
Height/Length- about 1/2 feet to 1 feet
Leaves Type/ Shape/ Size- green
Flowers Size/ Colour/ Calyx/ Bracts- light blue small flowers
Fruits Type/ Shape/ Size Seeds-Not seen

A wild weedy aster… I have seen it in at least three continents in the end of summer early fall..  no digital photos to share though…


Ageratum conyzoides surely….have worked on this plant at NIPER for 2 years in a row…..



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Wild Plant for ID : Munnar : 011111 : AK-1: A small plant with Purple flowers found growing wild at Munnar, Kerala on the 21st of Oct,08.

Some Asteraceae member?



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identification no221111sn3: Kindly ID this herb.

location:mulshi, pune 3000ft. above msl
habitat:wild
plant habit:herb

height:tiny


… this may be Chromolaena odorata.


Yes Chromolaena odorata


Can it be Ageratum conyzoides?


Sparsely pilose leaves (IMG_6467) suggesting me to go with Ageratum conyzoides.


Looks lik Ageratum conyzoides to me too.

Here I found good pics of Ageratum conyzoides
http://issg.org/database/image.asp?ii=1682&ic=e

I refered clear pics of Chromolaena odorata in here too-
http://issg.org/database/species/ecology.asp?si=47&fr=1&sts=sss&lang=EN


Ageratum conyzoides



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efloraofindia:”For Id 04072012MR3’’ wild plant with blue and white flowers ?Ageratum conyzoides at Pune: June 2012; Pune; Would appreciate your help to Id this wild plant with a blue flower though in the pic it looks much lighter and another white flower. Sorry I do not have the exact dimensions but approx 3 cms in ht,

?Ageratum conyzoides


It may be Ageratum conyzoides.


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efloraofindia:”For Id 04072012MR2’’ wild plant with white flower ?Ageratum conyzoides at Pune:

June 2012; Pune;
Would appreciate your help to Id this wild plant ht 2 cms; leaf size 1.5cms by 1cm; flower head 1 cm, white in color, another white bud turned into a light purple flower head after 5 days.

?Ageratum conyzoides


Ageratum conyzoides, again.


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efloraofindia:”For Id 04072012MR1’’ is this Ageratum conyzoides at Pune:

June 2012; Pune;
Would appreciate your help to Id this wild plant ht 3 cms; leaf size 2cms by 1cm ;flower head 2cm, pale purple in color

?Ageratum conyzoides


Yes, A. conyzoides!



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Wild Plant for ID : Lonavala : AK-3: A wild plant with white flowers seen in Lonavala on 18/8/2012.


Ageratum conyzoides L.



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310519AB2 ID : 6 posts by 3 authors. Attachments (2)- around 500 kb each.

Identification, please. Very abundant plant in Melghat.

Regrets for the out focussed photo. You will find the same plant in the background as well, which has become the focus of the photo.

Date/Time- November 7, 2017; 09:25 AM

Location- Place, Altitude, GPS- Eastern Melghat, 21°27.407′ N,77°27.086′ E

Habitat- Garden/ Urban/ Wild/ Type- Wild

Plant Habit- Tree/ Shrub/ Climber/ Herb-  Herb

Height/Length- Upto 2-3’ Height

Flowers Size/ Colour/ Calyx/ Bracts- Size 3-5 mm diameter and height, Colour White. Apart from identification, what is the native/invasive status of this species in India?


Ageratum conyzoides…


Want to confirm… Are we sure this is not Vernonia cinerea?


Also important because V. cinerea is native to Africa whereas A. conyzoides is native to the Americas.


… said is correct; am also agree with them, no doubt in that. now it’s very common at marshy and aquatic areas in our country( we have also, Andhra Pradesh)



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Ageratum conyzoides L. ? Hooghly 20-12-12 sk3: This is a wild herb in waste-place and roadside.

Species : Ageratum conyzoides L.?
H & H : about 2 ot 3 ft high
Date : 20/12/12

Place : Hooghly


This is Ageratum conyzoides L. (Asteraceae)



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sharing pixs of Ageratum conyzoides from Pune of different plants at different places and time.


Yes … Nice photographs.



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It is my pleasure to share few images of Ageratum houstonianum  (Asteraceae) one of the virulent colonisers of wastelands. Similar to its much more virulent cousin, A.conyzoides . As per the efi thread A.houstonianum is larger and robust than A.conyzoides having more florets in the flower heads, thicker leaves and longer hairs. 

Habit: Herb 

Habitat: Waste lands 

Sighting: Chikmagalur, Karnataka, about 1000 msl 

Date: 06-06-2014 and 13-08-2014


A reply from another thread:

“… Ageratum is Ageratum conyzoides only a variant but the remaining two are A.haustonianum


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Ageratum conyzoides L. from Guwahati.: Attached images are Ageratum conyzoides L.
Date :12.12.12
Location: Guwahati-12 [Dist- Kamrup(Metro)]
Family : Asteraceae
Genus & species : Ageratum conyzoides L
Habitat: Grows wild
Habit :Herb
Inflorescence : Head


Yes … Nice photographs



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Attachments (9). 4 posts by 3 authors.
This belongs to last episode, but as I found this later, I am sharing this now..
as in the previous fortnight all my Ageratum pics belonged to A. houstonianum, I was looking for A. conyzoides which I could find in a nursery near Kurukshetra..

hope the id is right and this one is Ageratum conyzoides


efi page on Ageratum conyzoides   


Key to Ageratum can be found in – efi thread


I guess only 2 sp. A. conyzoides and A. houstonianum are listed in Harayana and I guess A. conyzoides looks more close.


I agree with you … for ID,


I also agree for Ageratum conyzoides L.


.

References:

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