Polygonaceae: Polygonum plebieum: 1 high res. image.
Polygonum plebieum collected from Paderu forest area in Visakhapatnam district of Andhra Pradesh
It is not
https://efloraofindia.com/2011/03/23/polygonum-plebeium/
May be some Perscaria species as per images at
https://efloraofindia.com/2011/03/20/persicaria/