Thanks Sir for upload and nice write up...hope I can find all of these..
On Fri, May 3, 2013 at 7:22 AM, Balkar Singh <[email protected]> wrote: > Nice Description and Key Sir. Thanks for clearing our doubts > > > On Wed, May 1, 2013 at 8:20 PM, Gurcharan Singh <[email protected]>wrote: > >> >> *Conyza bonariensis* (L.) Cronq., Bull. Torrey Bot. Club. 70: 632. 1943 >> syn: *Erigeron* *bonariensis* L; *Erigeron* *linifolius* Willd. >> >> It is quite common to find small flowered (rather small headed) species >> of Conyza throughout India along roadsides and wastelands. They are much >> more commoner in temperate climates. During my last visit to Kashmir I >> found that larger headed of the two, more robust, long hairy and low >> growing Conyza bonariensis (syn: Erigeron linifolius) had come in flowering >> and more delicate with smaller heads, taller with branching in the upper >> part Conyza canadensis came up to flowering towards end of June. This year >> with extended stay in Kashmir i found that by middle of july another very >> tall often growing to the height of 1-2 m, much more robust plant had come >> up and started flowering, but by the time C. canadensis had almost started >> to disappear. Initially I thought this to be late flowering population of >> Conyza canadensis, but when It came to flowering in August I discovered >> that it was very distinct from Conyza canadensis in robust habit, broader >> leaves, larger heads and phyllaries with much shorter hairs. It was finally >> identified as Conyza albida now correctly known as Conyza sumatrensis, a >> species often confused with the other two. Here is the key to separate them >> >> 1a. Plants usually shorter than 50 cm; lateral branches equalling or >> overtopping main axis; heads 5-8 mm across; >> ray corolla shorter than 0.3 mm; fruiting head 8-10 mm across, >> pappus 3-4 mm long; lower leaves >> linear-lanceolate, upper >> linear....................................................................................Conyza >> bonariensis >> 1b. Plants usually taller than 50 cm; lateral branches shorter than main >> axis; heads less than 6 mm across; >> lower leaves lanceolate or oblanceolate, upper >> linear-lanceolate..................................... (2) >> >> 2a. Ray corolla shorter than 0.3 mm; heads 4-6 mm across; fruiting head >> 7-8 mm across, pappus 3-4 mm >> long; lower leaves oblanceolate, upper linear-lanceolate; plants >> densely hairy, phyllaries short >> >> hairy........................................................................................................................Conyza >> sumatrensis >> 2b. Ray corolla 0.3-1 mm long; heads 2-4 mm across; fruiting head 5-6 mm >> across, pappus 2-3 mm long; >> leaves lanceolate; plants sparsely hairy; phyllaries with few long >> hairs............................Conyza canadensis >> >> >> >> -- >> 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://www.gurcharanfamily.com/ >> http://people.du.ac.in/~singhg45/ >> >> -- >> You received this message because you are subscribed to the Google Groups >> "efloraofindia" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/indiantreepix?hl=en. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > > > -- > Regards > > Dr Balkar Singh > Head, Deptt. of Botany and Biotechnology & > Horticulture Incharge > Arya P G College, Panipat > Haryana-132103 > 09416262964 > > -- > You received this message because you are subscribed to the Google Groups > "efloraofindia" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/indiantreepix?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- Regards, Dr. Nidhan Singh Assistant Professor Department of Botany I.B. (PG) College Panipat-132103 Haryana Ph.: 09416371227 -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
