Polygonum arenastrum

Polygonum arenastrum

Polygonum arenastrum Jord. ex Boreau.
Engl.: oval-leaf knotweed.
Suom.: tannertatar.
Sven.: bägartrampört.
Bot. syn.: Polygonum aequale Lindm.

I have no articles for this botanical term, but there might be some for the next level down (if found).