To import into your scene go to File>Append, navigate to .blend files folder, open the file, open "Group" folder, then double-click on the name of the group and append.  

The name of the model and the name of the group is the same. 

Crataegus_hedge_0201(1.8m)

Crataegus_hedge_0202(1.8m)

Crataegus_hedge_0203(1.8m)

Crataegus_hedge_0204(1.8m)

Crataegus_hedge_0205(1.8m)

Or you can select it and copy it using CTRL+C and in your scene pressing CTRL+V.

Please note that this scene contains textures from  Vitaly  - Textures may not be redistributed

HDRI maps are from HDRI Haven