Persicaria decipiens

 
Common name: Willowleaf Knotweed, Willow-Leaved Knotgrass
 


 
https://08511630493324166816.googlegroups.com/attach/10abd569351e75b2/P.glabra_DSR.JPG?part=0.1&view=1&vt=ANaJVrGoN4jRjY1LSGrtAfFHKrOnzhANJo_k4gJxnueotznN4dDp7n6XKTucJf5W9fxxtSNsRtQkz6gvqaxt99Kth9GzQDC_cgyPppL6BIXfb55FT327FhM
https://08511630493324166816.googlegroups.com/attach/86e37c198e986f77/P.barbata_Ochrea_DSR_1.JPG?part=0.1&view=1&vt=ANaJVrEfVrTwZN1owNfdPB55Zu7OkVwDZrbhQgNQnFM_yTLjTdidmXXs2y60F9Z6-WQVBNuE3X9GCeXZ8X6NKiCscR_MH19EsMxSvrx6SNe7EiO4UZRj3TI
https://08511630493324166816.googlegroups.com/attach/86e37c198e986f77/P.barbata_Ochreolae_DSR_2.JPG?part=0.2&view=1&vt=ANaJVrE55lPbKt-NmwAdxfpP7RWyBU-4q45DHaDV60okKSEvz7xjstPeMJoIlY3s8eq02bama_cv27H95QtfRCDzpsoDJSIVSSPNG4YURVRIhPWGAmFxlwQ
https://08511630493324166816.googlegroups.com/attach/86e37c198e986f77/P.barbatum_Nuts_DSR_3.JPG?part=0.3&view=1&vt=ANaJVrF8YSMxiopgP-04LhyxsExPsWY_U8aEvoahJds-oFSgUMpdx5jj8BSGRA1UedtDIknFGRcoiVv0q2GrYOj3NHFyub2c8rt9Qs1whn5X-47P-u_yVOI
Persicaria glabra (Willd.) M.Gomez is a common wild herb along drainage channels in Pantnagar.
Shot at Pantnagar, Uttarakhand.
Could you please share some more pics here Sir? Somehow it looks more like P. barbata to me. Not sure though.
Yes with your observation and following post by ...;
it resemble to P. barbata.
It is quite common nowadays here and I will post new pics soon in the same thread to conclude the correct ID.
Thank you ... for correcting the ID. It is P.barbata var. gracilis vide eFlora Pakistan-
However, the image on the same page in Annotated Checklist of the Flowering Plants of Nepal
have a different Ochrea. Must be a different var.
Attaching few more pics to show ochrea, leaf margin cilia, ochreolae and nuts.
Welcome to this eFI group ...
It seems that I am the first person directly benefited by your expertise in Polygonum s.l.
Thank you for indicating towards important characters of P.serrulata which is now known as P.decipiens (R.Br.) K.L.Wilson as per The Plant List 2013.
If I am not wrong it is the same species once known as Persicaria salicifolia (Brouss. ex Willd.) Munshi & Javeid.
I also consulted a century old (but still relevant) Flora of Upper Gangetic plains which differentiates P.barbatum and P.serrulatum as-
Lvs tapering to the acute base, marginal cilia of ochreae longer than tube................................Polygonum barbatum
Lvs tapering to rounded or subcordate base, marginal cilia of ochreae not longer than tube........Polygonum serrulatum
Accordingly my plant is P.serrulatum. eFlora Pakistan does not has this species and I wrongly concluded to P.barbata.
I hope the ID is now fixed to Persicaria decipiens (R.Br.) K.L.Wilson (=Persicaria serrulata);
Thanks to ...
https://08511630493324166816.googlegroups.com/attach/dfd7bcef8145cf6f/Persicaria-hydropiper-Near%20Dakpathar-DSC09200a.jpg?part=0.5&view=1&vt=ANaJVrH3PQbL0okS8DnVTU3rlT7VhoLFIcOjUYs-Hhz7J3QQPOW2QbaBYg4srZFk9NbvV2nzvYUD1ahE8dzVeoli71MrlPnQFrD02OLod0afS7NCgNYxtZA
https://08511630493324166816.googlegroups.com/attach/dfd7bcef8145cf6f/Persicaria-hydropiper-Near%20Dakpathar-DSC09188a.jpg?part=0.1&view=1&vt=ANaJVrFUXZ_zWv4mE2EwpSPGPqetbnau-_bYlHITmCmI4uLlGCCje8jTkhyhDruxEK8P7-AfM9E6a9Zhc9vLl54eFJktPJj8shvV_dp8kVam7McoZ4oBph4
 
https://08511630493324166816.googlegroups.com/attach/dfd7bcef8145cf6f/Persicaria-hydropiper-Near%20Dakpathar-DSC09196a.jpg?part=0.3&view=1&vt=ANaJVrFTKF4C_L4t6127GgV9tQS_zKtwqezKsZLCxVpWN2WUG9JXApykcuGGQUTy-xYFS2EhIvSSFYSNmMnTpIEPI-rKd1_ElFJImHVC86yAfkzlciQRm_g
https://08511630493324166816.googlegroups.com/attach/dfd7bcef8145cf6f/Persicaria-hydropiper-Near%20Dakpathar-DSC09197a.jpg?part=0.4&view=1&vt=ANaJVrHhHoIsBT8AuYCe8_gHk7z0tpHxrWi7nbnhHbvaoTmLMvS7fQ10UPETA7yhMFDqdQAB-2WqizCXu4sFWOJRb_QkJiz2aoyUyoaIloFA8Ex_IC4dmqE
https://groups.google.com/group/indiantreepix/attach/dfd7bcef8145cf6f/Persicaria-hydropiper-Near%20Dakpathar-DSC09192a.jpg?part=0.2&authuser=0&view=1
5 posts by 4 authors. Attachments (5).
Perhaps Persicaria hydropiper photographed from near Dakpathar in Uttarakhand.
Please validate or give correct ID  
efi page on Persicaria hydropiper  
Inflorescence is usually lax in P. hydropiper.. here it is dense. I can also see faint red blotches on leaf in the first photograph... which are not found in P. hydropiper. More characters (i.e. nuts and perianth) should be checked for the proper ID.
Comments are welcome.
In light of the discussion in another thread
it resembles to the species Persicaria decipiens (=Persicaria serrulata).
 
 
 
 
 
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