Many many thanks Gurcharan ji for the clarity. Will attempt to put comparative pictures in a separate post.
Regards. Dinesh On Sat, Apr 16, 2011 at 9:41 AM, Gurcharan Singh <singh...@gmail.com> wrote: > Dinesh ji and Tanay > I have seen both and can say they are miles different. I had seen this > plant earlier many times mostly in vegetative condition and always thought > it to a be some shrub, with leaves much larger and broader than Chromolaena > odorata. The inflorescence is also much different, an erect spreading > panicle in Ageratina. > To me they are so different that I never thought the two can be confused. > > These are Chromolaena odorata > > http://www.nt.gov.au/nreta/natres/weeds/alerts/index.html > > http://toptropicals.com/pics/garden/05/23/3764.jpg > > http://toptropicals.com/pics/garden/05/23/3765.jpg > > and these Ageratina adenophora > > > http://www.lookfordiagnosis.com/images.php?term=Ageratina&lang=4&from3=32&from2=24 > > > http://de.wikipedia.org/w/index.php?title=Datei:Ageratina_adenophora_(Habitus).jpg&filetimestamp=20080403122255 > > http://www.sfwma.org/ageratinaadenophora.html > > > > > -- > > Dr. Gurcharan Singh > Retired Associate Professor > SGTB Khalsa College, University of Delhi, Delhi-110007 > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > Phone: 011-25518297 Mob: 9810359089 > http://people.du.ac.in/~singhg45/ > > > On Sat, Apr 16, 2011 at 9:17 AM, tanay bose <tanaybos...@gmail.com> wrote: > >> Great question Dinesh Ji >> I too have the same question >> Tanay >> >> >> On Fri, Apr 15, 2011 at 8:31 PM, Dinesh Valke <dinesh.va...@gmail.com>wrote: >> >>> ... looks confusingly closer to *Chromolaena odorata*. >>> Gurcharan ji ... any clear visual key to separate the species ? >>> >>> Regards. >>> Dinesh >>> >>> >>> >>> >>> >>> On Sat, Apr 16, 2011 at 8:37 AM, Gurcharan Singh <singh...@gmail.com>wrote: >>> >>>> Ageratina adenophora (Spreng.) R. M. King & H. Rob., Phytologia >>>> 19:211. 1970 >>>> syn: *Eupatorium adenophorum* Spreng.; *Ageratina trapezoidea* (Kunth) >>>> R. M. King & H. Rob.; *Eupatorium glandulosum* Michx.; *Eupatorium >>>> trapezoideum* Kunth >>>> >>>> Perennial coarse herb; leaves opposite, ovate-deltoid, up to 10 cm long, >>>> 4-7 cm broad with broadly cuneate or truncate base, sparsely pilose on both >>>> surfaces, 3-nerved, margins crenate, on 4-5 cm long petiole; Heads white >>>> 6-8 mm long, 5-6 mm across, in loose compound corymbs, receptacle >>>> glabrous,; achenes black, 1.5 mm long, 5-angular, glabrous; pappus of 8-10 >>>> bristles. >>>> >>>> Native of Mexico, California and the West Indies, widely naturalised in >>>> tropical to subtropical areas. Photographed from Morni hills at about 1200 >>>> m >>>> on April 9, 2011. >>>> >>>> Common names: catweed, Crofton weed, croftonweed, hemp-agrimony, Maui >>>> pamakani, Mexican-devil, sticky-agrimony >>>> -- >>>> Dr. Gurcharan Singh >>>> Retired Associate Professor >>>> SGTB Khalsa College, University of Delhi, Delhi-110007 >>>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. >>>> Phone: 011-25518297 Mob: 9810359089 >>>> http://people.du.ac.in/~singhg45/ >>>> >>>> >>> >> >> >> -- >> *Tanay Bose* >> Research Assistant & Teaching Assistant. >> Department of Botany. >> University of British Columbia . >> 3529-6270 University Blvd. >> Vancouver, B.C. V6T 1Z4 (Canada) >> Phone: 778-323-4036 (Mobile) >> 604-822-2019 (Lab) >> 604-822-6089 (Fax) >> ta...@interchange.ubc.ca >> *Webpages:* >> http://www.botany.ubc.ca/people/mberbee.html >> http://www.botany.ubc.ca/people/gradstud.html >> https://sites.google.com/site/efloraofindia/ >> >> >> > > >
