The apple tree model is presented in three versions:


Autumn apple-tree - autumn leaves and apples on branches.
Summer apple tree - green leaves and apples on branches.
Spring blossoming apple-tree - small green leaves and flowers on the branches.

Trees are divided into three groups - according to the time of the year. Each group (tree) consists of objects:
Roots
Trunk
Large branches
Branches
Small branches
Leaves
Apples
Flowers (in spring version)

These objects are not merged into one mesh, so that if necessary, you can easily modify them (select, modify, hide, assign modifiers, delete, etc.).

Who works with V-Ray version lower than SP1, pay attention to materials section BRDF (Microfaset GTR (GGX)), if your version is older than SP1 - this option will be empty and you have to choose:
Blinn,Ward or Phong, depence on material.