Avens or wood avens, Geum urbanum is a close relative of the water avens or Indian chocolate (Geum rivale) and a member of the Rosaceae or rose family, making it a relative of the dog rose. As a member of this family it is a distant relative of apricots, apples, plums, loquats, peaches and the blackthorn tree from which we get sloes. It is closely related to the Potentilla genus, so is related to silverweed and cinquefoil, which its yellow flowers resemble.
The avens is native to Britain and mainland Europe as well as to Central Asia . Its root when freshly dug has a strong smell of cloves, and this is the reason for its genus name Geum, which basically means something with a fragrant aroma. The name urbanum means of the city, or perhaps sophisticated.
It was believed that the root was best gathered in Britain on the 25th of March as long as the soil was not wet. This was the time the root was believed to be at its most pungent. It has been used in medicine as well as in cooking; both in sweets and desserts, and the seeds may be substituted for cloves in an apple tart. The young leaves may be eaten raw in salads or cooked, and the root may be used to flavour soups and stews.

The root contains tannin and so it is useful as an astringent for diarrhoea and dysentery as well as for wound healing.
Nicholas Culpeper the English herbalist writing in the 17th century wrote about it in this way: -

He concluded his description with this: “It is very safe; you need have no dose prescribed; and is very fit to be kept in every body's house.”
It was used to flavour Augsburg Ale to impart both its flavour and its health-giving properties, with a sachet of the root being placed in each cask of ale. In the Middle Ages it used to be worn as an amulet to ward off evil spirits and venomous beasts, as it was regarded as a sacred herb, belonging to Saint Benedict, hence the name Herb Bennet (a corruption of Benedict).

(Hemlock is also called Herb Bennet and should not be confused with this. Legend has it that a monk gave Saint Benedict a cup of wine poisoned by hemlock, but when Saint Benedict blessed the wine before drinking it, the poison, which was a kind of devil, fled the cup with such force that it shattered, thus exposing the cup-bearing monk’s intent to kill Saint Benedict.)
