Polygonaceae Fortnight- Polygonum? for id from Gori valley area:: NS May 30

[Nidhan Singh]

Dear All,

This delicate herb was shot from Gori valley area..still lies unidentified with me..tentatively I have placed this under Polygonum

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Regards,

Dr. Nidhan Singh

Assistant Professor
Department of Botany
I.B. (PG) College
Panipat-132103 Haryana
Ph.: 09416371227

[J.M. Garg]

Forwarding again for Id assistance please.

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With regards,
J.M.Garg

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[surajit koley]

Polygonum nepalense Meisn. is an interesting plant. It comes under P. alatum Ham. in FBI. It was also referred to in P. khasianum Cas.

Thanks n regards

[Ritesh Kumar Choudhary]

Wondering how this plant missed my attention!

For me this is Persicaria sagittata (L.) H. Gross..characterized by the sagittate leaves.

Thanks for sharing the beautiful images Sir!

Regards,

Ritesh.

[Nidhan Singh]

Thanks Surajit Ji for inputs..thanks Ritesh Ji for identification...

[surajitkoley]

Thanks once again Ritesh Ji, but how do you explain - "perianth white ..... or red, ..... not becoming blue" as in FoNA, and also absence of at least 5 mm petiole, besides some other points?

Regards

[Ritesh Kumar Choudhary]

Thanks for your efforts dear Surajit ji...Perianth color is variable and taxonomically less important (atleast in Persicaria)...this blue seems to be an intermediate between white and pink. Further we can see the terminal leaves here with no petiole....'ll get them as you go down. 

Putting a link for your kind perusal. Hope the confusion will go.

http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000831063

Waiting to hear from you.

Best regards,

Ritesh.

[surajit koley]

Thanks a lot Ritesh Ji, I am really grateful for addressing my concern. I put down my explanation (in favour of P, nepalensis) -

• perianth can be white to pinkish or lavender; urceolate - FoNA
• upper leaves subsessile or clasping FoC; cordate to amplexicaul with a auricled base FoP; please also see entry in FBI. v. 41
• in P sagittata leaf margin is entire, also in P. nepalensis. But, the 2nd pic shows finely serrulate margin - is that a leaf? or is it a involucral leaf? Whatever it maybe the same margin can be seen in Balkar Sir's upload - https://groups.google.com/forum/?hl=en&fromgroups#!topic/indiantreepix/mpNsnfGz-8E
• some more images, assuming the ID there is correct - http://www.actaplantarum.org/floraitaliae/viewtopic.php?t=9070

I would request you to check Flora of British India also, because there are several var. under P. alatum Ham. and give your final verdict which I will accept whatever it may.

Regards

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[Ritesh Kumar Choudhary]

Thanks a lot Surajit ji for your concerns. 

I am happy that you are not blindly following my words. This inquisitiveness makes you different. But anyway, I am going to stick with my ID as the sagittate leaves are very clear in the photographs. Further, I've seen P. nepalense many times in field/herbaria but never found the same leaves (as in pics) anywhere. Identity in the links provided by you is correct and they definitely are P. nepalense. 

Regards,

Ritesh.

[Gurcharan Singh]

Yes this plant looks very different from Balkar ji's plant in which although upper leaves are clasping, the lower clearly show leaves with winged petiole. Nidhan ji plant is quite different, much more delicate, with clearly sagittate leaves. Thanks Nidhan ji and Ritesh ji, for introducing an interesting member of Polygonaceae. 

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/

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[surajit koley]

I accept Ritesh Ji. Thank you very much for spending some time over it.

Regards

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[J.M. Garg]

I think Persicaria nepalensis only as per images and details herein and as per discussions at SK120OCT02-2016:ID

---------- Forwarded message ---------
From: Nidhan Singh <nidhans...@gmail.com>
Date: Tue, 13 May 2014 at 16:38
Subject: [efloraofindia:188412] Polygonaceae Fortnight- Polygonum? for id from Gori valley area:: NS May 30
To: indiantreepix <indian...@googlegroups.com>

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With regards,
J.M.Garg

[Ritesh Kumar Choudhary]

I think this is P. sagittata.

Regards,

Ritesh

[J.M. Garg]

Thanks, Ritesh ji.

It does not match with P. sagitata as per POWO specimen 1 and two and GBIF specimens from Nepal and India- one and two

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With regards,
J.M.Garg

[Ritesh Kumar Choudhary]

Thanks for your comments! May I request Nidhan sir to upload more pictures if available?