Persicaria genus in Turkish Mad?makgiller or Buckwheat family (Polygonaceae) is included the Polygonum now. Today, separated from Polygonum. In this study, Pe. hydropiperoides belonging to given as a new species for flora of Turkey. Specimens were collected Sancaktepe/ Pa?aköy (Istanbul). Adding species, number Flora reached 12 (13 taxa). Additionally, name, detailed description, locality data,...