Thank you Mr. Fraser-Jenkins for elaborated enlightenment ! Thank you.
Saroj Kasaju On Wed, Jul 5, 2017 at 6:49 AM, Chris Fraser-Jenkins < [email protected]> wrote: > Dear Dr. Kasaju, > Not sure what information of relevance to these taxa in India your > post from FoC provides, but I'm afraid I can't recommend following the > Flora of China (actually the "Flora of Errors") for many things, though > it's OK concerning Chinese distribution for these two. But as you may know > from Indian literature, the distribution, altitude and ecology of E. > arvense subsp. arvense and subsp. diffusum in the Indo-Himalaya is very > well known, along with where they occur in terms of depth into the Himalaya > - and has been well known for many decades. As you can see, the altitudes > given for the whole of China (including boreal China) are complete nonsense > as far as the situation in India is concerned! Subsp. arvense is confined > to high, semi-dry inner Himalayan areas and becomes progressively rarer > eastwards - finally dying out eastwards in Nepal. It is not known in West > Bengal, or Sikkim, nor Bhutan or Arunachal Pradesh. Subsp. diffusum on the > other hand - the common N. Indian taxon - is in the outer Himalaya to C. > Himalayan ranges and goes right through N.E. India. In India, one is a > typical European element dying out to the east and quite typically only > reaching as far east as E. Nepal (at high altitude behind the Himalaya), > the other is a Sino-Himalayan element, extending as far west as Pakistan. > They are easy to distinguish as arvense has single ridges in the sheaths > and diffusum has double ones, also arvense is sterile-fertile dimorphic > with brown, achlorophyllous fertile stems that do not develop green > branches, but die off - while diffusum is fertile on persistent and green > branches and is not sterile-fertile dimorphic. > You will find details in much Indian literature, including my paper > on pteridophytes of the far-west Himalaya (in Fern Gaz. 2010), also in the > Ferns and Fern-Allies of Nepal 1: 86-89 (2015) and of course in the > Annotated Checklist of Indian Pteridophytes vol. 1: 61-62 (2016), which is > where you need to look concerning details of Indian pteridophyte species. > Best wishes, > Chris Fraser-Jenkins, Kathmandu. > > > ------------------------------ > *From:* Saroj Kasaju <[email protected]> > *To:* J.M. Garg <[email protected]>; [email protected] > *Cc:* efloraofindia <[email protected]> > *Sent:* Tuesday, 4 July 2017, 20:42 > *Subject:* Re: Re: Fwd: Equisetum arvense L. ???? > > Dear all , > > Copy pasting from Flora of China > > Equisetum arvense Linnaeus : > > Forests, forest margins, under bushes, meadows, banks of rivers and > streams, open fields; sea level to 3700 m. > > Equisetum diffusum D. Don : > > Under bushes, roadsides; sea level to 3400 m. > > Thank you. > > Saroj Kasaju > > On Tue, Jul 4, 2017 at 1:37 PM, J.M. Garg <[email protected]> wrote: > > Thanks, Chris ji. > ---------- Forwarded message ---------- > From: "Chris Fraser-Jenkins" <[email protected]> > Date: 04-Jul-2017 12:26 PM > Subject: Re: Fwd: Equisetum arvense L. ???? > To: "J.M. Garg" <[email protected]> > Cc: > > No, arvense does occur in the high Himalaya behind the main ranges, and in > the far west, but not at Mirik. The common Himalayan species is this, E. > diffusum, closely related to arvense and I treat it as a subspecies. > Chris F.-J. > > > ------------------------------ > *From:* J.M. Garg <[email protected]> > *To:* efloraofindia <[email protected] m > <[email protected]>> > *Cc:* Saroj Kasaju <[email protected]> > *Sent:* Sunday, 2 July 2017, 21:51 > *Subject:* Fwd: Equisetum arvense L. ???? > > Thanks, Saroj ji. > ---------- Forwarded message ---------- > From: "Saroj Kasaju" <[email protected]> > Date: 02-Jul-2017 12:51 PM > Subject: Equisetum arvense L. ???? > To: "efloraofindia" <[email protected] m > <[email protected]>>, "J.M. Garg" <[email protected]>, > "Tabish" <[email protected]>, "[email protected]" < > [email protected]> > Cc: > > Dear Members, > > Location: Soureni, Mirik, India > Date: 18 May 2017 > Altitude: 4500 ft. > > Thank you. > > Saroj Kasaju > > > > > > -- 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.
