Tuberous Comfrey (Symphytum tuberosum) widespread in damp woods often near streams in Europe. It shares the properties of the other Comfries and has been used as a medicinal herb, possibly as a poultice - hence the name, Knitbone. ...

The young leaves can be cooked as a herb, coated in a batter and made into fritters and the rootes when roasted and dried (as with dandelion roots) and then ground are said to make a ‘coffee’ substitute. Podere Montecucco, Orvieto. Mar 2017