Persicaria lapathifolia

Persicaria lapathifolia (L.) Delarbre, Fl. Auvergne ed. 2: 519 1800. (syn: Dioctis maculatum Raf.; Dioctis vernum Raf.; Discolenta lapathifolia Raf.; Discolenta scabra Raf.; Persicaria attenuata subsp. pulchra (Blume) K.L. Wilson; Persicaria hypanica (Klokov) Tzvelev; Persicaria lapathifolia (L.) Gray .......................; Persicaria linicola (Sutulov) Nenukow; Persicaria oneillii Brenckle; Persicaria saporoviensis (Klokov) Tzvelev; Persicaria scabra (Moench) Moldenke .; Persicaria tomentosa (Schrank) E.P.Bicknell; Peutalis nodosa (Pers.) Raf.; Polygonum andrzejowskianum Klokov; Polygonum brittingeri Opiz; Polygonum ferrugineum var. patagonicum (Speg.) Macloskie; Polygonum glandulosum Kit.; Polygonum hypanicum Klokov; Polygonum incanum F.W.Schmidt; Polygonum incarnatum Elliott; Polygonum lapathifolium L. ..........; Polygonum linicola Sutulov; Polygonum mariae V.N. Vassil.; Polygonum nodosum Pers. .; Polygonum pallidum With.; Polygonum paniculatum Andrz. [Illegitimate]; Polygonum pensylvanicum subsp. oneilii (Brenckle) Hultén; Polygonum persicaria var. incanum (F.W. Schmidt) Meisn.; Polygonum persicaria var. incanum Roth; Polygonum persicaria var. vernicosum Cham. & Schltdl.; Polygonum saporoviense Klokov; Polygonum scabrum Moench; Polygonum spectabile var. patagonica Speg.; Polygonum tomentosum Schrank; Polygonum utriculatum Remy); 
 
Common name: Pale Knotweed, Pale Persicaria, Pale smartweed, Curlytop knotweed, Willow weed • Manipuri: চাওখোঙ মানবা Chaokhong-manba


Pale persicaria
(Persicaria lapathifolia (L.) Delarbre, syn. Polygonum lapathifolium L.) is a plant of the family Polygonaceae. It is closely related to Redshank and as such is considered a weed in Britain and Europe. Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed.  
The species is a species complex made up of a great many varying forms, sometimes considered varieties. The environment also has a strong influence on the morphology of an individual plant.  
Pale persicaria is an annual herb with erect reddish stems with swollen joints, growing to a height of 20 to 80 cm (8 to 31 in). The leaves are alternate with short stalks, often densely hairy underneath. The leaf blades often have a dark-coloured blotch in the centre and are lanceolate or narrowly elliptical and have entire margins. Each leaf base has stipules which are fused into a stem-enclosing sheath that is loose and fringed with few if any hairs at the upper end. The inflorescence is a dense spike, often nodding. The perianth of each tiny pink flower consists of four or five lobes, fused near the base. There are six stamens, two partially fused carpels and two styles. The fruit is a rounded, flattened nut. This plant flowers from July to September.[1]  
Pale persicaria is found in many parts of both the Old World and New World. There are many varieties and sub-species and the plant is morphologically variable. [2]  
It is found growing on the sea shore and in disturbed ground such as arable land, gardens, waste ground, rubbish tips and road verges.[1] 
(From Wikipedia on 8.1.14)

 
 
https://groups.google.com/group/indiantreepix/attach/21023db9f9d8117b/Persicaria-lapathifolia-Kashmir-c.jpg?part=0.3&authuser=0&view=1
https://groups.google.com/group/indiantreepix/attach/21023db9f9d8117b/Persicaria-lapathifolia-Kashmir-a.jpg?part=0.1&authuser=0&view=1
Persicaria lapathifolia from Kashmir : Attachments (3).  2 posts by 2 authors.
Persicaria lapathifolia (L) Delarbre (syn: Polygonum lapathifolium L.) from Kashmir, growing in wet places, along drains and ditches.
Photographed from Botanical Garden near Cheshmashahi on June 26, 2010 
Common Names: Pale persicaria, Pale smartweed
Used against cancer. Herb is suspected of causing dermatitis and death in cattle.
 
 https://groups.google.com/group/indiantreepix/attach/68e1d1804635c4c4/Polygonum_Java.JPG?part=0.1&authuser=0&view=1
Polygonaceae Fortnight: Plant of Central Java 13 : 4 posts by 3 authors. Attachments (1).
Could you help me to id our Polygonum please. 
More likely Persicaria lapathifolia
Agree with ... ID.
Leaves with red blotches, eciliate ochrea and other leaf characters are pointing towards P. lapathifolia.
 
 https://groups.google.com/group/indiantreepix/attach/1e2c56ae306ff573/Persicaria-lapathifolia-Kashmir-b.jpg?part=0.2&authuser=0&view=1
Persicaria lapathifolia (L.) Delarbre
syn: Polygonum lapathifolium L.
Another characteristic species of moist places having dark curved patches on leaves like P. capitata but with linear-lanceolate leaves and slender inflorescence.
Common along drains, ditches and stream banks in Kashmir. Photographed from Srinagar.

Yes! This looks like a typical P. lapathifolia to me too. Thanks for sharing the beautiful photographs.
  
https://groups.google.com/group/indiantreepix/attach/a519ac772d008ae7/IMG_7189.jpg?part=0.2&authuser=0&view=1
 https://groups.google.com/group/indiantreepix/attach/a519ac772d008ae7/IMG_7181.jpg?part=0.1&authuser=0&view=1
Polygonaceae for ID5 posts by 3 authors. Attachments (2).
Bannerghatta, Bangalore
June

It is Persicaria barbata (L.) H.Hara (= Polygonum barbatum L.); which is frequently available near roadside canals.
the plant uploaded is a variety of Persicaria lapathifolia as P. barbata has long cilia at ochrea being diagnostic feature
 
 
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_1331_03Aug2016.jpg?part=0.10&view=1&vt=ANaJVrFWNJwsbjSrKGrzqPOS5CLrpTgF7KOAt9zMZwYa2SHsMhuK_dKHnur7454hM-m0SjGMLl53Y4KlfERozC1KCxzVnLZudzb5YlHGoQHr1ig7PJpAx1M
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5407_26Aug2017.jpg?part=0.9&view=1&vt=ANaJVrEjsPzc4rI3lvFyhHMN3LQKV7aigH7eYMLTDqEcuBFTeIyrm4OSYdOTXN6BBLvpkmEHAaJ4RjggHemOBRp4ljno6-EdVCfCcdd97RXgQ-wqUMjkcI0
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5380_26Aug2017.jpg?part=0.8&view=1&vt=ANaJVrGeZHW7Dtjfc4ghAY-E_MOWM-Qog_TY8lsRvX0myWkASIdD6J_ConADx8CgHiBOedY1G-0H4ZLMEELfTGSAm2SpgjH0Z3AESCsjTu0LK751t4QlfFY
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5371_26Aug2017.jpg?part=0.7&view=1&vt=ANaJVrFkpU7CPnEt_ZBoxlzTDCUhXogcIoeJ-Uyszzh7hIRGJmMAavMnKoqFbakDUpcbkCuAmUcN2oABZi6fM2HH-yR_Q3FLEYLA5gNTcIRyf9GITHb-6h0
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5368_26Aug2017.jpg?part=0.6&view=1&vt=ANaJVrGi3UufcHHot-uqTOlwDGwOBBegezqehgNFhXkafPkyUlRvnQ8vysfnKj3Cuhfwq58_vBlLtUDqXBlTqGc62emEJ9vFX7zEM1d_UrgdBsYiJwGwCt8
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5356_26Aug2017.jpg?part=0.5&view=1&vt=ANaJVrFMf8NDyKbzdAMGT8Mg7MbDZMe9V_p3ldQG8YDC_NcFt4IQTa-qZNRv8AXkZjfEVrx7PNIp6tj18eH8qIorL1ezfk1xNnquXjXpvHQvOTYHtSeKU_c
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5345_26Aug2017.jpg?part=0.4&view=1&vt=ANaJVrHQpkrei2hPDKbydwbaIMNSL4q2o-YzB8UCU4dlMYAxloy3Im-Vnf-HBzTiLZ51PcZE86CAdT0KlExncfPLZ6eVlFfTULByQbCrlrEFqvyEyZUejm0
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5341_26Aug2017.jpg?part=0.3&view=1&vt=ANaJVrF62J_VnmyeeUlRqHXBhqwf0KQa2kwD9DIP5sRYjDP6H3lvyRVrFvbdZYSLAQsvFebc7V9cenCLG3zJ8le0Q3eNzSvTZUTpKqasMOhg4_u3W9NPbZc
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5338_26Aug2017.jpg?part=0.2&view=1&vt=ANaJVrHRetPYiUBYlZcEflhyGg-nr9NEmbVFI2zQqX97mDGAR1B-y677PYbeuINEM_YuwBl77DAg2Q7TaRQGXWDuBxEwKMJk8MNgE10KPHrOzClRxi18cuA
https://08511630493324166816.googlegroups.com/attach/101ab204e9603/_MG_5183_26Aug2017.jpg?part=0.1&view=1&vt=ANaJVrFpN48Mkr6hhjf-btbNZuOIvqBOyD8KbJy-V-NNp_nTNQK0rbs4fNwUlsoqp-BExTEvNpw5_SxkqBg0rq0M5Nch5R5ZeZZsNHJCkH_RbK7UjZlsRSk
Persicaria maculata ABAUG2017/40 : 4 posts by 2 authors. Attachments (10)
These plants are shorter with more upright, denser, flower-spikes. The leaves have black markings. I think this is Persicaria maculata. Please advise.
Persicaria maculata?
Mcleodganj and above, Dharamshala, HP
1700m and above.
26 August 2017 and 03 August 2016 (fruit)

I think you are talking of Persicaria maculata S.F.Gray synonym for Persicaria lapathifolia subsp. lapathifolia (also available in efi) as per Catalogue of Life & not Persicaria maculata (Raf.) A. Löve & D. Löve (not available in efi). 
I also think matches with images in efi at Persicaria lapathifolia

 
 
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/DSC_0194.JPG?part=0.6&view=1&vt=ANaJVrFMNsUDHK8zERNycyDWgVGb0AVcZDftbLHpFU9YesxaEqss9R_zL7J-PF7VFuDhDctdJ9s_F3gg1xYx_dDTxNlXN_FbrujojuZayQ6s-qUT-f08vUI
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/DSC_0193.JPG?part=0.5&view=1&vt=ANaJVrFV4GEidNCuCqEUwNZ3kgefSMi2TLEA5DPPbyOkWONb2weClmMjGC7NcuFqwcGlI7Bpo7oeFf0xPnRL15JbdEX5-Gw9Y-af8l_2RFNfsVAHoNvHJ3g
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/DSC_0192.JPG?part=0.4&view=1&vt=ANaJVrFkvjcLz32tRfD1fNyvsslzJ3CgoopEHUHT-LF3gizA-w307RdfIMUil0wWZ3TzmarmVxoiH07Xoc4lHFZu1MxU2ijt2agkKNaVl8-I5XhNmGPfwz8
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/CSC_0221.JPG?part=0.3&view=1&vt=ANaJVrGc_Cu3rBm_qIvOJWjgBdwl-fuY1Yw_f8xmM3hwPT-K2ML_03WL_RLwBYnjrUb-KinfuyjQK0w8hu52ACgyKa56pff61TpbNlve7A9rOiEcE3_HeEI
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/CSC_0220.JPG?part=0.2&view=1&vt=ANaJVrHyXGOohhz3bQ1bwZD_BTJ30E6-PtdUhMoBO4fuBDOUqqYohI_rl_altDkbwGq3Napq4iY1CDXVLpZ2sxAwH5UH6p_uiEXcv0RKO1-5YxP7DOzPlLk
https://08511630493324166816.googlegroups.com/attach/187c92ba424d8/CSC_0219.JPG?part=0.1&view=1&vt=ANaJVrF9M94X6FmcpIQWr5sfG9sEY0hmMOw34H_AtQsp0MC3coLFfG42e7VrOXXQwVFUvtoZgKcsEKIIzPGF5PpwkCnjfznmFJJ2Yzac68seqqDhUYy4zBc
SK784 09 OCT-2017:ID : 3 posts by 2 authors. Attachments (6)
Location :  Tatopani, Pokhara, Nepal 
Date : 8 April  2017
Altitude : 3000 ft.
 
Persicaria ...???

I think Persicaria lapathifolia (L.) Delarbre
Famly: Polygonaceae

  
https://08511630493324166816.googlegroups.com/attach/27c64ffc08c6c/_MG_0692_resize.JPG?part=0.1&view=1&vt=ANaJVrF4ZjCZtplVG5PQU746u8lfYqxjIMQ_O04CxjfSS6ZpDxNqOesB_uZcp5FqSuqhgh0f0QEY9jPUliSLN2xaKyszWZbE_JYUcb-_E-bG8ET88Vloh9Y
 
Persacaria Id from Bangladesh_SM_1424 : 4 posts by 3 authors. Attachments (1)
Flowering: January
Habitat: Road side
Habit: Herb 

I can see a purple blotch on the leaves. Most likely Persicaria lapathifolia (L.) Delabre
Family: Polygonaceae 




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