You are very correct Radha Ji. Polygonum plebeium is one of the most troublesome and morphologically variable species. In Flora of British India, Hooker hesitatingly described almost 11 forms of this species, some of which got escalated later to the species level. The plant is also confused very often with P. aviculare, P. cognatum and other species which are different. I wish members would upload many pictures of the same during this fortnight so that we can observe the variations more closely.
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