Loosestrife (Lysimachia), fam. Primulaceae.
In the forest, particularly along the rivers, in waterlogged areas, Creeping Jenny (Lossestrife, Moneywort) (Lysimachia nummularia) is common. It forms spreading whip-like shoots with oppositely arranged round leaves.
Its Russian folk name is "meadow tea", indicating its usefulness for brewing. As the other Loosestrife species (Spotted, Yellow), it contains vitamins, stimulates liver function, so it infusion may have real benefits. The healing properties of this tea have been used to treat septic wounds, eczema, thrush, and stomatitis. However, quite clean herb should be found for that, which is not very easy, since it always creeps so close to the ground.