I had never met this plant before, but the flowers that appeared shocked me with their strangeness and beauty. He was found by the water, plucked and brought home with a bouquet. But as soon as we dipped the bouquet into the water, the flowers turned into buds. However, I was able to immediately identify the name from the photo of the buds: lat.
Ficária vérna or a Spring Buttercup.
In addition to the name, it turned out that the plant, like all buttercups, is poisonous, especially for sheep. It kills them to death. But it is a honey plant from which bees collect more pollen than nectar. Bees are not sheep, that's understandable.
This plant is very capricious and closes its stamens with petals in the absence of sun, low temperatures and in the rain. Having received the stress of tearing off, it also closed and I thought that I would have to go to their shore today to take pictures of them disbanded, but in the morning I saw such a yellow holiday on the table and did not have to go down to the river.