Persicaria species- near Radhanagri near Kolhapur

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Persicaria for ID : Attachments (1). 8 posts by 4 authors.
This erect herb less than 1 mt high was seen gregariously growing on the edge of a paddy field near Radhanagri near Kolhapur. 21 October 09. The plant is smaller and slenderer than P. glabra and has white flowers instead of pink, the leaves are similar.
How about Persicaria hydropiper
Yes, I had also reached this ID but had doubts on account of plant being eglandular and the spikes being 10-15 cm long. Do you have any means of sorting these variations?
Just trying to decipher the name ................
Persicaria mitis (Schrank) Assenov in Jordanov, Fl. Nar. Rep. Balg. 3: 239. 1966. [Synonyms: Polygonum mite Schrank, Baier. Fl. 668. 1789; D.A.Webb & Chater in Tutin et al., Fl. Europ. 1: 79. 1964; Schiman-Czeika & Rech.f. in Rech.f., Fl. Iran. 56: 61. 1968; R. R. Stewart, Ann. Cat. Vasc. Pl. W. Pak. & Kashm. 211. 1972; P. hydropiper L. var. eglandulosa Hook. f., Fl. Brit. Ind. 5: 39. 1886; Persicaria hydropiper subsp. mite (Schrank) A. Majeed & Kak in J. Bomb. Nat. Hist. Soc. 517. 1984; Persicaria hydropiper subsp. mite (Schrank) Munshi et Javeid, l.c. 75. 1986. comb. illegit.]
I am just sujjesting this because of its eglandular nature and similarity in look with P hydropiper.

 
 
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