A reply:
"Dear Surajit-ji,
I think I did not write precisely enough as it lead to a misunderstanding!
I was not meaning the leaves are floating on the surface of the water -
such leaves, which are very wide-lobed, are not of use for identification,
nor are under-water ones, when they occur. I was rather meaning the whole
plant sticks up, supported above the water, or on the ground in very wet
places - so, yes, erect, as you say.
I am actually rather sure this one should be C. pteridoides - though I
suppose I really should see the stipe to be 100% sure. It is very typical
of it and its large size (when full-grown) and masses of congested
pinna-lobes - the stipe reaches up to half a cm. thick or even 1 cm., and
is of a fragile fleshy texture, full of aerenchyma.
Not sure which other pictures you are referring to, but if they are really
correctly identified (unlikely!) or authenticated, full-sized plants should
look very similar to your plant. Most botanists do not know the difference
between thalictroides (which name is frequently used sensu latu) and the
other species in the genus - as they are all closely related and similar.
Best wishes, Chris."



On 30 November 2012 22:39, surajit koley <[email protected]>wrote:

> Sir,
>
> I think it is not floating type, rather it is erect. Moreover, the
> pictures, found in the net, of *Ceratopteris 
> pteridoides<http://www.wlf.louisiana.gov/sites/default/files/images/jpg/fact_sheet_plant/31761-Ceratopteris%20pteridoides/Ceratopteris_pteridoides_sterile_LNHP_copy.jpg>
> * do not match. Though some are wrongly identified, i think -
> http://houseaqua.ru/91-vodyanaya-kapusta.html !
>
> However, attaching two more larger images for your perusal. I would try to
> have a closer view of its lower stipe and update.
>
> Thank you very much.
>
> Regards,
>
> surajit
>
>
> On Fri, Nov 30, 2012 at 5:26 PM, jmgarg1 <[email protected]> wrote:
>
>> A reply:
>> "Namaste from cold, frosty Edinburgh! From the size and development of
>> the frond of that Ceratopteris, I would think it much more likely (and from
>> the locality) to be C. pteridoides rather than thalictroides. A diagnostic
>> feature of this species, not shown in the photo, is the rather thick,
>> succulent lower stipe full of aerenchyma, adpated for floating. Would that
>> be so in this specimen? The two also differ cytologically and are genuinely
>> different taxa despite being lumped together by everyone - including myself
>> until a couple of years ago.
>>
>> Cheers, Chris Fraser-Jenkins, Royal Botanic Garden, Edinburgh."
>>
>>
>> On 29 November 2012 10:38, jmgarg1 <[email protected]> wrote:
>>
>>> Forwarding again for Id confirmation or otherwise please.
>>>
>>> Some earlier relevant feedback:
>>>
>>>  This is Water Sprite [Ceratopteris thalicteroides]. Will send my
>>> photographs of this later.
>>>  With regards,
>>> Neil Soares.
>>>
>>>  Thank you very much Neil Sir, found similar picture at -
>>> http://indiapetstore.com/retail/index.php?main_page=product_info&cPath=9_64&products_id=1534
>>> .
>>> Regards,
>>> surajit
>>>
>>>
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: surajit koley <[email protected]>
>>> Date: 20 November 2012 22:04
>>> Subject: [efloraofindia:138696] strange aquatic from Hooghly 20/11/12 sk2
>>> To: efloraofindia <[email protected]>
>>>
>>>
>>> Sir,
>>>
>>> Found this strange looking small herb in a small pond, growing with
>>> other aquatic vegetation.
>>>
>>> Species : UNKNOWN
>>> H & H : small aquatic herb
>>> Date : 19/11/12, 1.27 p.m.
>>> Place : Hooghly
>>>
>>> Thank you & Regards,
>>>
>>> surajit
>>>
>>>  --
>>>
>>>
>>>
>>>
>>>
>>>
>>> --
>>> With regards,
>>> J.M.Garg
>>> http://en.wikipedia.org/wiki/User:Jmgarg1
>>> 'Creating awareness of Indian Flora & Fauna'
>>> The whole world uses my Image Resource of more than a *thousand species*& 
>>> eight thousand images of Birds, Butterflies, Plants etc. (arranged
>>> alphabetically & place-wise):
>>> http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use
>>> them for free as per Creative Commons license attached with each image.
>>> For identification, learning, discussion & documentation of Indian
>>> Flora, please visit/ join our Efloraofindia Google e-group:
>>> http://groups.google.co.in/group/indiantreepix (more than 2000 members
>>> & 1,37,000 messages on 31/10/12) or Efloraofindia website:
>>> https://sites.google.com/site/efloraofindia/ (with a species database
>>> of more than 7500 species).
>>> Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of
>>> India'.
>>>
>>>
>>
>>
>> --
>> With regards,
>> J.M.Garg
>> http://en.wikipedia.org/wiki/User:Jmgarg1
>> 'Creating awareness of Indian Flora & Fauna'
>> The whole world uses my Image Resource of more than a *thousand species*& 
>> eight thousand images of Birds, Butterflies, Plants etc. (arranged
>> alphabetically & place-wise):
>> http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use
>> them for free as per Creative Commons license attached with each image.
>> For identification, learning, discussion & documentation of Indian Flora,
>> please visit/ join our Efloraofindia Google e-group:
>> http://groups.google.co.in/group/indiantreepix (more than 2000 members &
>> 1,37,000 messages on 31/10/12) or Efloraofindia website:
>> https://sites.google.com/site/efloraofindia/ (with a species database
>> of more than 7500 species).
>> Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of
>> India'.
>>
>>
>


-- 
With regards,
J.M.Garg
http://en.wikipedia.org/wiki/User:Jmgarg1
'Creating awareness of Indian Flora & Fauna'
The whole world uses my Image Resource of more than a *thousand species* &
eight thousand images of Birds, Butterflies, Plants etc. (arranged
alphabetically & place-wise):
http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use them
for free as per Creative Commons license attached with each image.
For identification, learning, discussion & documentation of Indian Flora,
please visit/ join our Efloraofindia Google e-group:
http://groups.google.co.in/group/indiantreepix (more than 2015 members &
1,39,500 messages on 30/11/12) or Efloraofindia website:
https://sites.google.com/site/efloraofindia/ (with a species database
of more than 7500 species).
Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of
India'.

-- 



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