In the Middle Ages the Hautbois Strawberry  Fragaria moschata was grown and eaten in Europe, because the American Strawberries, from which the today Garden Strawberry Fragaria x ananassa has been breeded, weren't known in Europe at that time. The Hautbois Strawberry is usually dioecious, which means that there are separate male and female plants. Usually only one sex can be found at one location, the plants are multiplying by forming runners. Almost all of the Hautbois Strawberry sites today are ancient cultural relics, for example that in castle Rodenstein near Reichelsheim in the Odenwald (Hesse, Germany). Today many of these relict populations consist of only female plants, and any fruits are hardly generated. Fruit generation without prior fertilization does occur but is very rare, and can lead to somewhat stunted fruits. In the Odenwald population I did not find any fruits.