Fact of the week
In Britain we have two native species of oak which look very similar. This is how to tell them apart: pedunculate oaks (Quercus robur) produce acorns which hang on a stalk or peduncle while the acorns of the sessile oak (Quercus petraea) are stalkless.
![](https://southwickcountrypark.com/wp-content/uploads/2022/11/sessile-oak-acorns-cc0-pxhere.com_.jpg)
![](https://southwickcountrypark.com/wp-content/uploads/2022/11/pedunculate-oak-acorns-by-llez-cc-by-sa-3.0-wikimedia.org_.jpg)
Left: sessile oak; right: pedunculate oak. Header image: the oak by the bridge between Sleepers and Cornfield photographed by Ian Bushell