Hästhov, Tussilago farfara, is ‘coltsfoot’. Both the Swedish and the English words relate to the green leaves of the plant, as they look a bit like a horse’s hoof. Those will show up later, long after the flowers have disappeared.
However, the Latin name, tussilago, is now used more often in Sweden than the old Swedish one. It is said to be created from tussis, ‘cough’ because it should have been used as a medicine against that, which is not verified. The species name farfara is of unknown origin.
(This picture was taken on April 18; the world is a little greener now)