caltha palustris. marsh marigold on the shore of a reservoir in the north of russia

natural background beauty nature north wildflowers buttercup family homeopathic marsh marigold gold golden sumpfdotterblume botanical water caltha wildflower wild flower yellow plant bloom spring green kingcup floral beautiful flora blossom pond petal palustris season bright stamen leaf botany fresh color blooming outdoor colorful closeup waterside medicinal siberia russia arctic herb palustris shore reservoir summer siberian