I also notice the stigmas of Chromolaena are much longer than in Ageratina.
-- 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 11:21 AM, Gurcharan Singh <singh...@gmail.com>wrote: > Thanks Dinesh ji, great job done. > I would also be uploading my photographs from Delhi of Chromolaena > > > -- > 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 11:13 AM, Dinesh Valke <dinesh.va...@gmail.com>wrote: > >> Dear friends, >> >> This post showing comparative pictures of *Chromolaena odorata* AND >> *Ageratina >> adenophora*. >> ... hopefully will help to reduce any confusion between them. >> >> >> Here are some excerpts from earlier post of Gurcharan ji [ >> https://groups.google.com/d/topic/indiantreepix/jRwrq_wfsFM/discussion ] >> ... it will further help in distinguishing them. >> >> >> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx >> >> from Gurcharan ji: >> >> .... leaves (of *Ageratina*) much larger and broader than *Chromolaena >> odorata*. The inflorescence is also much different, an erect spreading >> panicle in *Ageratina*. >> >> *Ageratina*: Phyllaries persistent, 8–30 in 2(–3) series, 0- or 2-nerved, >> lanceolate to linear, ± equal (herbaceous). Florets 10–60; corollas white or >> lavender, throats obconic to campanulate (lengths 1.5–2 times diams.); >> styles: bases sometimes enlarged, glabrous, branches linear, seldom distally >> dilated. >> >> *Chromolaena*: Phyllaries usually readily falling (at least in fruit), >> 18–65+ in 4–6+ series, 3–5-nerved, ovate to oblong or lanceolate, unequal >> (papery or herbaceous), outer shorter. Florets [6–]15–40[–75]; corollas >> white or purple to blue, lavender, or reddish, throats cylindric (lengths >> 3–4 times diams.); styles: bases not enlarged, glabrous, branches linear to >> linear-clavate. >> >> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx >> >> from Vijayasankar ji: >> >> *Ageratina adenophora *ALWAYS occurs in higher altitudes, whereas, >> *Chromolaena >> odorata *is usually found in plains (may be with some exceptions). >> *A.a. *has purplish stems and petioles, while *C.o.* is generally green >> throughout. >> *A. adenophora *can also be distinguished by its leaves which as >> triangular (deltoid) in outline with a more or less truncate (straight) base >> (except subcuneate at petiole). >> >> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx >> >> >> Many thanks to Gurcharan ji and Vijayasankar ji for making it easy to sort >> these two species. >> >> >> Regards. >> Dinesh >> >> >> >> >> > > > x
