Dear Ritesh Ji, I think it is one plant only.
Enclosing link for earlier post for cross reference. https://groups.google.com/forum/#!searchin/indiantreepix/SK120OCT02-2016$3AID|sort:date/indiantreepix/j99i-98UUVU/Tv7pudJFCAAJ Thank you. Saroj Kasaju On Fri, Dec 8, 2017 at 1:12 PM, J.M. Garg <[email protected]> wrote: > Thanks a lot, Ritesh ji. > > On 08-Dec-2017 11:58 AM, "Ritesh Kumar Choudhary" <[email protected]> > wrote: > >> Please also check the high resolution image of DSC_0451 for the presence >> of recurved prickles. There seems to be mixture of P. nepalense as well. >> DSC_457, 459, 448 and 450 are not matching well with P. sagittata. They are >> probably P. nepalense. >> >> P. sagittata is a polymorphic species. Pl see the quote from Fl. China: >> *Polygonum* *sagittatum* s.l. is an extremely variable species and known >> from both Asia and North America. Some authors have pointed out, on the >> basis of differences in achene surface and leaf margin, that North American >> populations are separable from Asian ones, and have treated them as two >> distinct varieties of *P*. *sagittatum*, or as two distinct species: *P* >> . *sagittatum* in North America and *P*. *sieboldii* in eastern Asia. In >> Park’s previous taxonomic monograph of *P*. sect. *Echinocaulon*(Syst. >> Bot. 12: 167–179. 1987; and Mem. New York Bot. Gard. 47: 1–82. 1988), *P* >> . *sagittatum* and *P*. *sieboldii* are recognized as conspecific mainly >> based on flavonoid chemistry and also the observation that North American >> plants are well within the range of variability of eastern Asian ones. >> However, the recent molecular analyses of North American and eastern Asian >> populations of *P*. *sagittatum* (Park, in prep.) show that these >> disjunct populations are genetically somewhat divergent from each other. >> The degree of genetic divergence, however, strongly suggests that they can >> be recognized either as a single polymorphic species (*P*. *sagittatum* s.l.) >> or two distinct varieties of *P*. *sagittatum*, but they can hardly be >> treated as two distinct species. >> >> Regards, >> Ritesh >> >> > -- 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 an email to [email protected]. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
