Good morning and thanks Dr. P. K. S. Regards,
surajit On Thu, Dec 6, 2012 at 7:09 AM, Dr Pankaj Kumar <[email protected]>wrote: > Dear Mr. Surajit > I was reading some of your mails above. Indeed you jumped deep into it and > this is really nice of you to have so much of patience. > There is one issue here I think Many of the characters you are talking > about are so variable that they cant be trusted to define a species based > on morphology. > According to the protologue if you can see, both species are written > as PERENNIAL. > Leaves in both are heteromorphic and hence there is no distinct shape and > size, unless and untill one it toooooo long or tooooo short. Even the > margin shape is not consistent. > The prominence of ribs of achenes also depends on how dry the seeds are. > Pappus is 6-9mm in one and 8-14mm in another, so this is slightly > overlapping too. > I am forwarding this to Gunjan Sud also. May be she can dig something out > of it. > Best of luck. > Pankaj > > > > > On Wednesday, 5 December 2012 00:11:47 UTC+8, surajitkoley wrote: >> >> Sir, >> >> I hope this is *Sonchus arvensis* Linnaeus (বন-পালং), as in my earlier >> post at - https://groups.google.com/d/**topic/indiantreepix/** >> ZlmjKtsjUr4/discussion<https://groups.google.com/d/topic/indiantreepix/ZlmjKtsjUr4/discussion> >> . >> >> It's an experience to look back into history :- >> >> 1. http://ia700605.us.archive.**org/BookReader/** >> BookReaderImages.php?id=**mobot31753000237401&itemPath=%**2F1%2Fitems% >> **2Fmobot31753000237401&server=**ia700605.us.archive.org&page=** >> >> n635_w1150.jpg<http://ia700605.us.archive.org/BookReader/BookReaderImages.php?id=mobot31753000237401&itemPath=%2F1%2Fitems%2Fmobot31753000237401&server=ia700605.us.archive.org&page=n635_w1150.jpg> >> 2. http://ia600609.us.archive.**org/BookReader/** >> BookReaderImages.php?id=**mobot21753000004407&itemPath=%**2F0%2Fitems% >> **2Fmobot21753000004407&server=**ia600609.us.archive.org&page=** >> >> n417_w1150.jpg<http://ia600609.us.archive.org/BookReader/BookReaderImages.php?id=mobot21753000004407&itemPath=%2F0%2Fitems%2Fmobot21753000004407&server=ia600609.us.archive.org&page=n417_w1150.jpg> >> >> ID Help :- >> >> 1. >> http://www.mpbd.info/plants/**sonchus-wightianus.php<http://www.mpbd.info/plants/sonchus-wightianus.php> >> 2. http://plantillustrations.org/**taxa.php?id_taxon=2478&lay_** >> out=2&photo=0&volume_entire_**work=&series=&volume_series=&** >> >> all=&full_size=&illustration=&**language=153<http://plantillustrations.org/taxa.php?id_taxon=2478&lay_out=2&photo=0&volume_entire_work=&series=&volume_series=&all=&full_size=&illustration=&language=153> >> >> Some confusion :- >> >> 1. http://www.efloras.org/**florataxon.aspx?flora_id=2&** >> >> taxon_id=242349619<http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242349619> >> 2. http://www.efloras.org/**florataxon.aspx?flora_id=1&** >> >> taxon_id=242349589<http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242349589> >> 3. >> http://www.theplantlist.org/**tpl/record/gcc-77555<http://www.theplantlist.org/tpl/record/gcc-77555> >> 4. >> http://www.theplantlist.org/**tpl/record/gcc-97065<http://www.theplantlist.org/tpl/record/gcc-97065> >> 5. >> http://www.theplantlist.org/**tpl/record/gcc-48853<http://www.theplantlist.org/tpl/record/gcc-48853> >> 6. >> http://www.ars-grin.gov/cgi-**bin/npgs/html/taxon.pl?34932<http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?34932> >> >> Thank you & Regards, >> >> surajit >> > -- > > > > --
