Vray 3ds max file is also in archive (just plants and no scattering).
3ds max2014 (vray + corona)
Fbx
There is a 28m * 21m plane in the scene with 4 different corona scatter.
Plane and scattered objects are not FBX and OBJ files, just the main plants, grasses and flowers.
corona scatter settings screen shots in archive
changing the size of scattering maps gives you different results.
For importing into other software than 3ds max, use standard fbx.
polys: 185.525
verts: 348,061