Which tree of our gardens is the origin of the aspirin?

It is in the willow and more precisely in its bark, than the origin of the aspirin is. With more than 80 billion compressed per annum, it acts of the medicamentous substance most sold in the world. It is with F. Hoffmann in 1897, that one allots the paternity of the aspirin: it associated salicylic acid (resulting from the willow) acid spiric (resulting from queen-of-near).