Persicaria maculosa · dėmėtasis rūgtis

Polygonum persicaria EN · spotted lady's thumb, Jesusplant, and redshank DE · Floh-Knöterich LT · dėmėtasis rūgtis LV · blusu sūrene, blusene PL · rdest plamisty

https://en.wikipedia.org/wiki/Persicaria_maculosa It is widespread across Eurasia from Iceland south to Portugal and east to Japan. It is also present as an introduced and invasive species in North America.