Coltsfoot – Tussilago farfara – Hästhov / Tussilago
The Swedish name Hästhov means Horse’s Hoof.
The flowers (which superficially resemble dandelions) appear early in the spring, on stems with no apparent leaves. The leaves, which resemble a colt's foot in cross section, do not appear until after the seeds are set.
The Latin name "tussilago" means cough suppressant. The plant has been used historically to treat lung ailments such as asthma as well as various coughs by way of smoking. Crushed flowers supposedly cured skin conditions, and the plant has also been consumed as a food product. Caution, though - there are documented cases of it causing severe liver problems in infants.
Alternative English names include Tash Plant (I’m curious about the origin of that!), Ass's foot, Bull's foot, Butterbur, Coughwort, Foal's foot, Foalswort, Horse Foot and Winter heliotrope. (Source: Wikipedia)