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/
